AT&T is secretly throttling all of its smartphone customers during phone calls. This was tested on several devices including the Galaxy Note.
http://thesmartphonechamp.com/att-secretly-throttling-their-smartphone-customers-video/
I noticed this the other day as well. I don't use data very often whole on a call, and when i noticed the slower speeds, I attributed it to where i was.
If this is true, its yet another reason to start hating on AT&T!!
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Probably correct.
Side Note: who is the author? He lost a lot of credibility on his silly commentary on tablets.
Ugh..... I wish I lived in an area with better tmobile coverage
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CradleRob said:
I noticed this the other day as well. I don't use data very often whole on a call, and when i noticed the slower speeds, I attributed it to where i was.
If this is true, its yet another reason to start hating on AT&T!!
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Yeah it's really noticeable when you do something try to send a picture message while on the phone. The upload speed is just crazy low.
No throtling being done here. From my understanding during a phone call lte simply cannot be used in conjunction with voice calling, so the LTE radio is turned off and voice is sent over hspa+(or whatever other bands its using) and data switches to HSPA+. So not neccesarily intentional throttling per say, just hardware and technological limitations. Once VoLTE is more common practice I'm sure this will change.
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vclifton said:
No throtling being done here. From my understanding during a phone call lte simply cannot be used in conjunction with voice calling, so the LTE radio is turned off and voice is sent over hspa+(or whatever other bands its using) and data switches to HSPA+. So not neccesarily intentional throttling per say, just hardware and technological limitations. Once VoLTE is more common practice I'm sure this will change.
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Yeah, I noticed this also a while back.
vclifton said:
No throtling being done here. From my understanding during a phone call lte simply cannot be used in conjunction with voice calling, so the LTE radio is turned off and voice is sent over hspa+(or whatever other bands its using) and data switches to HSPA+. So not neccesarily intentional throttling per say, just hardware and technological limitations. Once VoLTE is more common practice I'm sure this will change.
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This. A member of these forums (Planoman, I think) apparently asked Lisa Gade directly about this based on a comment she made in a Note review and she confirmed it.
vclifton said:
No throtling being done here. From my understanding during a phone call lte simply cannot be used in conjunction with voice calling, so the LTE radio is turned off and voice is sent over hspa+(or whatever other bands its using) and data switches to HSPA+. So not neccesarily intentional throttling per say, just hardware and technological limitations. Once VoLTE is more common practice I'm sure this will change.
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That's not really true. If it were then the faster the connection you have, the faster your on call connection would be. If what you were saying was true then when I'm in an area that gets 9 megs during a call, I should get better on-call data speeds than if I was in an area with 2 megs. Instead regardless of if I'm in a 9 meg or 2 meg area, my data speeds during a call still instantly drop down to around 1 meg and the upload ALWAYS goes down to the 20k area (even if I'm in an area that gives me over 2 megs of upload. BTW, it wasn't always like this either. It isn't a limitation of technology, it's a limitation placed by AT&T, most likely to save spectrum. The crazy thing to me is they air these talk and surf commercials but you can barely do it now. If you compare it to Tmobile, it's like night and day.
I saw that the other day when I was on a call. Thought I was just in a bad area. Just tested on my coworkers note while he's on a call, same thing. Lame.
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vclifton said:
No throtling being done here. From my understanding during a phone call lte simply cannot be used in conjunction with voice calling, so the LTE radio is turned off and voice is sent over hspa+(or whatever other bands its using) and data switches to HSPA+. So not neccesarily intentional throttling per say, just hardware and technological limitations. Once VoLTE is more common practice I'm sure this will change.
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Click to collapse
How is it a hardware and technology limitation if the SAME PHONES perform DIFFERENTLY on different networks using the same technology?
Ok some of you guys really need to research more about how AT&T's 4G lte network works lol,Lte is purely for data so when not on a call the phone will sit on the lte band but the moment you make or receive a call the network hands off the phone to a hspa, hspa+ or edge (connection if the other 2 3g connections hspa or hspa+ is not available) . Once the call is done the phone should switch back to the preferred lte connection. Currently not being able to make voice calls over lte is a limitation by the tech, once voice over ip is ready to be implemented on lte then we're good to go.
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I can confirm this on my Note. I thought it was just an odd quirk for me but I'm partially glad to hear it affects everyone. On my old HSPA phone I could maintain 2-3 Gbps at home even while on a call - useful for work so I could be on a conference call while also remoting to my work computer's desktop. Now when I'm on a voice call the data connection becomes nearly useless. I may have to switch back to my old phone next time I need to do this - which is ridiculous!
So even if a phone call does force you onto HSPA, they are still throttling you far below the available bandwidth.
morpheus928 said:
Ok some of you guys really need to research more about how AT&T's 4G lte network works lol,Lte is purely for data so when not on a call the phone will sit on the lte band but the moment you make or receive a call the network hands off the phone to a hspa, hspa+ or edge (connection if the other 2 3g connections hspa or hspa+ is not available) . Once the call is done the phone should switch back to the preferred lte connection. Currently not being able to make voice calls over lte is a limitation by the tech, once voice over ip is ready to be implemented on lte then we're good to go.
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Click to collapse
This issue has nothing to do with LTE though. I know I saw someone earlier in the thread bring it up, but that has no bearing on what we're experiencing.
I noticed the same thing as well last week when I would make calls. LTE shuts off, 4G kicks in for calls. Hang up, LTE turns back on. Just like Verizon's no data while talking its simply a hardware limitation on the network for now.
edpsx said:
I noticed the same thing as well last week when I would make calls. LTE shuts off, 4G kicks in for calls. Hang up, LTE turns back on. Just like Verizon's no data while talking its simply a hardware limitation on the network for now.
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From what I've experienced it goes beyond just kicking you down to the HSPA network.
They definitely changed this. Tested this extensively when the skyrocket came out
The hardware is not capable of both seperate radios operating at the same time and voice over lte has not been implemented.
Plain and simple.
When you make a call the lte radio goes idle. The hspa (3g and hspa+) radio activates
Speeds during call should be the equivelant of speeds achieved with a 3g phone...like we confirmed with a gs2 Back then
Now though
Slow speeds while on a call
tested 3g speeds...added the phone apn and select it. It may or may not work but if it works it will lock you onto 3g briefly enough to do a speed test. Compare that to your in call tests. or use a 3g only phone To get a comparison test IN REAL TIME
Technically att could begin throttling but it could be network issues as well.
techntrek said:
From what I've experienced it goes beyond just kicking you down to the HSPA network.
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Scratch everything i said...they have obviously changed this since those tests we did. In call Speeds come in at 600 kbps and no upload at all and out of call 3+ mbps
Althouh slow...600 mbps should load pages etc...but it isnt.
Definitely something screwy going on. ..time to call att again
00mred00 said:
Tested this extensively when the skyrocket came out.
The hardware is not capable of both seperate radios operating at the same time and voice over lte has not been implemented.
Plain and simple.
When you make a call the lte radio goes idle. The hspa (3g and hspa+) radio activates
Speeds during call should be the equivelant of speeds achieved with a 3g phone...like we confirmed with a gs2
So...if you have slow speeds while on a call either the 3g network is having issues or the 3g speeds suck there. You absolutely will not achieve lte speeds in a call.
If you want to test 3g speeds...add the phone apn and select it. It may or may not work but if it works it will lock you onto 3g briefly enough to do a speed test. Compare that to your in call tests. or use a 3g only phone To get a comparison test IN REAL TIME...dont go off of crap you were doing with a phone 3 weeks ago. We all know the att network is not that consistant.
Technically att could begin throttling based on the pta apn. ..but so far our testing shows exactly what I described above
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That's what I was talking about. I could live with a fallback to HSPA until they implement voice on LTE, but the results are much slower than that.
morpheus928 said:
Ok some of you guys really need to research more about how AT&T's 4G lte network works lol,Lte is purely for data so when not on a call the phone will sit on the lte band but the moment you make or receive a call the network hands off the phone to a hspa, hspa+ or edge (connection if the other 2 3g connections hspa or hspa+ is not available) . Once the call is done the phone should switch back to the preferred lte connection. Currently not being able to make voice calls over lte is a limitation by the tech, once voice over ip is ready to be implemented on lte then we're good to go.
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Perhaps YOU should do a little more research...I assure you I am not a ROOKIE when it comes to these things. I have known for a fact that people were able to surf and talk on AT&T's network in the past without any problems. Now internet is practically UNUSABLE while on a call. Pages wont even load. There is something very underhanded going on.
Even by your own statement the phone should revert to 3g speeds while a call is being placed so why are speeds equivalent to EDGE/Dial Up when people have adequate signal strenght?
Related
So I was thinking about the tbolt, and realized something that I believe is interesting:
It's pretty common knowledge that Verizon CDMA does not currently support simultaneous voice/data, a huge grievance for many a verizon iPhone owner. The Thunderbolt is touted to be the first device that can handle this function and will do so by handling voice over the CDMA network and data over the LTE network. Makes sense, sounds good and all right? BUT....I was thinking about coverage of LTE and how it's pretty scarce for now and was wondering what would happen if you were not in an LTE area and using the Tbolt? Wouldn't the absence of the LTE network effectively stifle your ability to use data while on the phone?
Does anyone have any info on this or remember reading anything about it? It seems to me that it is entirely possible that the Tbolt will have the same limitations over simultaneous voice/data as the iPhone and other smartphones as long as the user is in a non-4G/LTE area. I am lucky enough to live in a 4G/LTE area so this wouldn't be a huge factor I guess but some people were really looking forward to having that capability.
Unlike all the rumors, the phones has two radios.
1 - 1x voice/data radio
2 - EVDO / LTE radio
The phone will do simultaneous voice and data in both 4G and 3G areas. Only issues is that two radios means increased battery drain
need bb said:
Unlike all the rumors, the phones has two radios.
1 - 1x voice/data radio
2 - EVDO / LTE radio
The phone will do simultaneous voice and data in both 4G and 3G areas. Only issues is that two radios means increased battery drain
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Click to collapse
very cool, i was not aware of that. thanks! that does suck about the battery though.....
did you have a source for the dual radio information?
need bb said:
Unlike all the rumors, the phones has two radios.
1 - 1x voice/data radio
2 - EVDO / LTE radio
The phone will do simultaneous voice and data in both 4G and 3G areas. Only issues is that two radios means increased battery drain
Click to expand...
Click to collapse
Your post makes no sense bud. The phone has the following specs:
CDMA 1X/EVDO Rev.A: 800/1900MHz
CDMA LTE - 700MHz
Rev A Capable
The phone has one of 2 possibilities:
1. In an area with no 4G coverage, the phone will simply not work as advertised. It will act just like any other 3G smartphone.
2. The more likely option, and I say likely mostly because they like to avoid class actions: Verizon partly delayed the phone in order to upgrade the towers and networks with the ability to process 3G data and calls simultaneously.
mexiken said:
The phone has one of 2 possibilities:
1. In an area with no 4G coverage, the phone will simply not work as advertised. It will act just like any other 3G smartphone.
2. The more likely option, and I say likely mostly because they like to avoid class actions: Verizon partly delayed the phone in order to upgrade the towers and networks with the ability to process 3G data and calls simultaneously.
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Click to collapse
if that second option were true, wouldn't that mean that every phone currently running on 3G (iphones and droids alike) would all gain the ability to run simultaneous data and voice? that sounds very nice indeed.
i don't have any sources but i believe i remember reading that the nature of CDMA and how it connects prohibits simultaneous voice/data as opposed to however GSM operates. sorry for such broad information but i'm not exactly a wireless carrier expert. if what you said is true though and they found some way to upgrade it, that would be awesome for all those on verizon 3G.
my skeptical side though is saying that verizon is no saint and would just respond that simultaneous voice/data is a feature specifically for 4G service and if you aren't in a 4G area tough break and wait for 4G/LTE to roll out near you.
Actually VZW recently did a software upgrade for their infrastructure to allow simultaneous voice and data over EVDO Rev A and the Thunderbolt is their first handset with the radio capable of supporting it. From what I've read it's a hardware thing so they can't update firmware in other phones like the iPhone to support it. I can't link to any articles from the XDA App but read any of the major Android blogs as they've been reporting about it for the past couple days or do a Google search for SVDO.
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OK, hopped on a computer so here you go:
http://thecellphonejunkie.com/2011/...olt-will-have-simultaneous-3g-voice-and-data/
http://www.evdoinfo.com/content/view/2861/64/
BAAMM! lol
That is the rumor Verizon is not using 1X advanced, so the only way that simultaneous voice and data works if you have two radios which are capable of transmitting at the same time. This is why only select 4G phones support SVDO.
As I said earlier, SVDO will work in both 4G and 3G areas because of the dual radios on-board.
need bb said:
That is the rumor Verizon is not using 1X advanced, so the only way that simultaneous voice and data works if you have two radios which are capable of transmitting at the same time. This is why only select 4G phones support SVDO.
As I said earlier, SVDO will work in both 4G and 3G areas because of the dual radios on-board.
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Click to collapse
The Thunderbolt have SVDO support, because it's using a SVDO capable chipset. Dual radios doesn't have anything to do with it, but only with CDMA/ 4G LTE handoffs, which is similar to Sprint's 4G phones. SVDO works on a 1X and 1X Advanced capable device, so didn't need to switch to 1X Advanced in order for it to work, though they have been some 1X advanced codecs for a while. Verizon wanted this including in their iPhone 4 phones so bad, but it just wasn't ready.
PorscheGuy said:
OK, hopped on a computer so here you go:
http://thecellphonejunkie.com/2011/...olt-will-have-simultaneous-3g-voice-and-data/
http://www.evdoinfo.com/content/view/2861/64/
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Click to collapse
Good info, thanks.
Sent from my CM7 Incredible.
No problem! I'm just sharing what I've been reading but it's entirely possible that "need bb" knows something that I don't...
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Ok, so I was interested in checking out the LTE speeds and wanted to test out the ability to do SVDO. I went to my local Verizon store and realized that My area doesn't have 4G yet. Duh! lol. And when inspecting the phone itself I could not find a way to turn on or any mention of LTE in any way anywhere on the phone! Hmmmm. So then I tried to test SVDO. I called one t-bolt with the other display t-bolt and then tried to surf. Newp. no can do. The call went thru so Its all setup but maybe it had no sim card?? I didn't check. Maybe my area doesn't have SVDO yet either? Can anyone now confirm simultaneous voice and data??? Now that people have got the phone in their hands now.
I am not in a 4G area and I can confirm the phone does voice and data simultaneously, very well, I might add
dkoss said:
I am not in a 4G area and I can confirm the phone does voice and data simultaneously, very well, I might add
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Hmmmm, I wonder what I was doing wrong??
MauiKeitai said:
Hmmmm, I wonder what I was doing wrong??
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You know my verizon rep said a funny thing today when I asked him about the voice/data at the same time on 3G...he actually said "we don't guarantee that will work yet and that the network is still being worked on in some places to enable this feature for certain devices like the Thunderbolt" I had already tried it on the demo TB so I wasn't worried but maybe that's why it's not working for you.
I can also confirm that in a non 4g area it does both voice and data at the same time... nice feature I didn't expect.
Hmm, yeah I guess as usual my area is slow at upgrading the network. Man, if Verizon would pay my etf on Sprint I would be all over that thing.
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mexiken said:
Your post makes no sense bud. The phone has the following specs:
CDMA 1X/EVDO Rev.A: 800/1900MHz
CDMA LTE - 700MHz
Rev A Capable
The phone has one of 2 possibilities:
1. In an area with no 4G coverage, the phone will simply not work as advertised. It will act just like any other 3G smartphone.
2. The more likely option, and I say likely mostly because they like to avoid class actions: Verizon partly delayed the phone in order to upgrade the towers and networks with the ability to process 3G data and calls simultaneously.
Click to expand...
Click to collapse
I work for verizon and you are right they have changed on the network side making simultanious voice and data through both 4G and 3G and it was done on the network not on the phone itself. Now I don't know if this was the reason for the month and a half delay or not but makes sense. From what I heard from my friend in the testing department it had to do with battery.
I don't know about you guys but I really love the fact that all the naysayers that simultaneous voice and data is impossible can finally shut up. LOL
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Have we received a clear answer on how this works? Has anyone else noticed that when you loose 4g signal while on a call that the call will drop?
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phillycreamboy said:
Have we received a clear answer on how this works? Has anyone else noticed that when you loose 4g signal while on a call that the call will drop?
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Click to collapse
i know this is gonna sound mean but it makes sense. if u lose 4g its not a smooth transition. so until it reconnects to either 3g or 4g u tech dont have any service
Unfortunately they are right. There needs to be a better setup as anything up to 3G runs on the same CDMA radio, so therefor it switches and forces a dropped call. 4g is a separate card and works on it's own. Until there is a way to get "just" calling and 4g (aka turning 1X 2g, and 3g off but not 4g) it will continue to do that. I assume custom ROMs will do this in time, but as of the moment it's a known issue that it happens. Sorry to hear it causes you and so many others troubles.
kdb424 said:
Unfortunately they are right. There needs to be a better setup as anything up to 3G runs on the same CDMA radio, so therefor it switches and forces a dropped call. 4g is a separate card and works on it's own. Until there is a way to get "just" calling and 4g (aka turning 1X 2g, and 3g off but not 4g) it will continue to do that. I assume custom ROMs will do this in time, but as of the moment it's a known issue that it happens. Sorry to hear it causes you and so many others troubles.
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Click to collapse
well.....you could go into that secret menu and just enable LTE radio. i dont remember what the code was tho
Your phone calls do not go through the 4G network so that actually would make no sense at all... Your phone routes calls through the standard radio all all data through the 4G radio (if available). If you do not have 4G coverage, the both voice and data are carried on the standard 3g signal. This is Verizon's first simultaneous data and voice over 3g (yes, cdma data and voice) and there are known issues with the tech right now. However these issues have zero to do with any phone using 4G for data while you're on a call. Hope that helps clarify.
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So why is the 4g signal loss causing dropped calls?
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phillycreamboy said:
So why is the 4g signal loss causing dropped calls?
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Click to collapse
That's what I'm trying to figure out. Unless it's poorly programmed, it should maintain the voice connection as that's over 1x and independent of LTE.
phillycreamboy said:
So why is the 4g signal loss causing dropped calls?
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Click to collapse
It's most likely the same problem that Pantech UML290 users are experiencing when dropping from 4G to 3G, and both devices are using the exact same Qualcomm MDM9600 chip. If you look at the Engineering Mode when the drop from 4G happens, your phone doesn't just fall back to 3G, but it actually lose the connectivity for a few seconds and then "redials" back into the data connection.
I hope they fix this real soon.
When you lose 4g, the data tries to resume on 3g, and since no 3g and calls at the some time, you get data on 3g and dropped call
kdb424 said:
When you lose 4g, the data tries to resume on 3g, and since no 3g and calls at the some time, you get data on 3g and dropped call
Click to expand...
Click to collapse
That's incorrect.
you have to have CDMA service for a voice call. EVDO alone will not allow a voice call, LTE alone will not allow a voice call. you should be able to lose 3g and keep your call going, and you should be able to lose 4g and keep your call going.
Maybe that's their way of preventing talking while driving. lol.
milan03 said:
That's incorrect.
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So your saying I can make a call, and have 3g? Cause what I described happens on my phone. It resumes data, and kicks my call.
kdb424 said:
So your saying I can make a call, and have 3g? Cause what I described happens on my phone. It resumes data, and kicks my call.
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Click to collapse
You should be able to use data and voice at the same time on 3G.
It happens because both radios power down to meet SAR requirements. Two radios at full power = too much radiation
need bb said:
It happens because both radios power down to meet SAR requirements. Two radios at full power = too much radiation
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This is why we have brave hackers on jobs like this ob. Not sure if it'll happen or get widespread, but I'm sure someone is working on it/done it.
I don't see how that can be true. What does Verizon say?
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SVDO uses two transmitters simultaneously for voice+data over 3g. EVO has been using 4g+voice over CDMA for a long time.
look at the last couple pages of this document
http://www.qualcomm.com/common/documents/articles/1X_Advanced_Benefits_050509.pdf
I don't know if simultaneous voice+data over 3g is only available where verizon has 1x advanced or not. since SVDO only requires the handset to have the capability, it would make sense that it could use regular 1x and evdo simultaneously but it would use more spectrum.
phillycreamboy said:
I don't see how that can be true. What does Verizon say?
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Click to collapse
It is true.
Verizon says it is a limitation of their network system and that dropped calls will indeed happen when you leave a 4G zone. They have intentionally designed their network not to fall back onto CDMA when 4G is lost, and they hope their customers will be patient while they expand their 4G coverage - which is occurring at a very fast clip. See the following bit from CTIA this week:
However, Verizon has taken the view that it will minimize annoyances for users handing off between LTE and CDMA, because its LTE coverage will be so wide so quickly. For this reason, it is not bothering to invest in systems to support fallback to CDMA for voice calls when a customer moves out of an LTE zone. Although the call will break in this situation, it will be a rare occurrence, insists the cellco. CTO David Small reiterated the point at CTIA, saying: "At the velocity at which we are pushing LTE markets, this becomes a non issue."
From... http://www.rethink-wireless.com/2011/03/23/verizon-att-cross-swords-4g-plans.htm
But LTE is not handling voice on thunderbolt.
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http://www.youtube.com/watch?v=S7LWU15Zo_c
Pretty good review. Seems very honest. Though I happened to read a few comments.....did someone really say the Thunderbolt was better.....
shadowxaero said:
Pretty good review. Seems very honest. Though I happened to read a few comments.....did someone really say the Thunderbolt was better.....
Click to expand...
Click to collapse
Youtube commentors are the bottom of the barrel.
He stated call quality was worse when connected to 4G. All other things being equal, why should that affect call quality? The phone doesn't use the data network for calls, does it?
erikivy said:
He stated call quality was worse when connected to 4G. All other things being equal, why should that affect call quality? The phone doesn't use the data network for calls, does it?
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Click to collapse
I don't know but he also said it shoots in 1080p but that's wrong. He also said the battery is good and should last all day so I hope he's right about that.
I believe on CDMA that 3G turns off when on a call, but 4G stays on because it's on a separate radio? I imagine 4G being on while on a call could definitely degrade something.
His comments about 3G and 4G calling were interesting. As someone coming for a OG EVO, I never even considered having 4G on for voice calling, but I guess it certainly can happen, particularly if you're not managing radios aggressively.
Another plus for me is that I noticed the phone located itself in Irvine (my home city), so the review comments on call performance and reception are particularly helpful.
I do wish he was a bit more specific about what he had running for his battery comments. It sounded like he was on 4G a lot during his testing, so this is also encouraging.
He did get the video capture capabilities wrong, though (he mentioned 1080p recording a couple times).
reviewer is a moron, 3g/4g are only for data and do not effect your calls at all. calls are done through 1x. for ****s sake, stopped video after hearing that. im not interested in the review of someone who has absolutely no idea what he is talking about.
Correlation =/= Causation
LearnIIBurn said:
I believe on CDMA that 3G turns off when on a call, but 4G stays on because it's on a separate radio? I imagine 4G being on while on a call could definitely degrade something.
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Click to collapse
No, 3G is for voice, 4G is for data. That's why the Thunderbolt (which uses SVDO not EVDO) can get data while on a call.
jlevy73 said:
No, 3G is for voice, 4G is for data. That's why the Thunderbolt (which uses SVDO not EVDO) can get data while on a call.
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Click to collapse
maybe thats true on verizon but on sprint voice calls are over 1x not 3g and certainly not 4g. both 3g and 4g and only for data
Never the best compared to the leader smarthone galaxy s2.
DomSim said:
maybe thats true on verizon but on sprint voice calls are over 1x not 3g and certainly not 4g. both 3g and 4g and only for data
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He speaks the truth, the only way 4g could affect call quality was if the radios interfered. I'm thinking the more likely culprit is the radio towers themselves when he was in a 4G area.
jlevy73 said:
No, 3G is for voice, 4G is for data. That's why the Thunderbolt (which uses SVDO not EVDO) can get data while on a call.
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Click to collapse
I definitely don't download any data via 3G. I downloaded all my data via 4G on my Ntelos 3100 from 1994.
....zZzz
From the video, the menus were flying and the internet looks much improved too. He did make a few errors though. I hope he is right about the battery life.
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So just did some testing doing voice calls and web / data access at same time (Something cdma phones in the past could not do)
Voice call and on 4G at same time..ok (got 10meg down 1up while on voice call)
Voice call and on wifi at same time..ok
Voice call and on 3G at same time..
No go
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redhatter said:
So just did some testing doing voice calls and web / data access at same time (Something cdma phones in the past could not do)
Voice call and on 4G at same time..ok (got 10meg down 1up while on voice call)
Voice call and on wifi at same time..ok
Voice call and on 3G at same time..
No go
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This is pretty much how every other 4G phone operates.
the ports backwards, but could an adapter be made?
redhatter said:
So just did some testing doing voice calls and web / data access at same time (Something cdma phones in the past could not do)
Voice call and on 4G at same time..ok (got 10meg down 1up while on voice call)
Voice call and on wifi at same time..ok
Voice call and on 3G at same time..
No go
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Voice call and 3g at the same time is a known issue because current implementation of CDMA does not allow for voice calla and evdo data at the same time.
There is something called Simultaneous 1x Voice and EV-DO Data (SVDO) that is a handset upgrade that can allow voice calling and 3G (EVDO) at the same time. Currently Sprint nor Verizon have included SVDO capability on their handsets.
I wonder if Sprint is going to wait until CDMA 1x Advanced is implemented in their Network Vision project before including the SVDO feature in its handsets especially since the backhaul on Sprint's towers are so horrible with T1 lines.
I suspect you won't see SVDO in any handsets until late 2012 or 2013 when network vision is much more mature.
ericdabbs said:
Voice call and 3g at the same time is a known issue because current implementation of CDMA does not allow for voice calla and evdo data at the same time.
There is something called Simultaneous 1x Voice and EV-DO Data (SVDO) that is a handset upgrade that can allow voice calling and 3G (EVDO) at the same time. Currently Sprint nor Verizon have included SVDO capability on their handsets.
I wonder if Sprint is going to wait until CDMA 1x Advanced is implemented in their Network Vision project before including the SVDO feature in its handsets especially since the backhaul on Sprint's towers are so horrible with T1 lines.
I suspect you won't see SVDO in any handsets until late 2012 or 2013 when network vision is much more mature.
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Currently, Only the HTC Thunderbolt has SVDO enabled.
Can't you just go into ##3282# and enable evrc-b and make it work, or maybe that was something else? Remember doing something similar on the evo3d...could be wrong.
Edit: I think I am wrong about that, I believe that may have something to do with call clarity. Also, one thing I noticed is that while you are on a call you cannot enable 4g unless my phone was bugged. Because even after I hung up, I couldn't enable it without a reboot. Kinda weird.
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xcharles718 said:
Currently, Only the HTC Thunderbolt has SVDO enabled.
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Good find but I did more research on it and Verizon decided not to advertise that functionality on the Thunderbolt since they said the data rates are too slow and cannot support both voice and data. I think its because it is still using regular CDMA 1x. Verizon does not plan to upgrade their CDMA 1x network since their plans are to move to VoLTE once LTE is blanketed across the nation.
Once Sprint implements CDMA 1x Advanced on their network vision towers which allows for more 3 times more resources for EVDO since 1x voice will now use only 1/4 of the amount of resources than regular CDMA 1x, then SVDO should be more feasible to ensure a good user experience with both voice and data quality.
ericdabbs said:
Good find but I did more research on it and Verizon decided not to advertise that functionality on the Thunderbolt since they said the data rates are too slow and cannot support both voice and data. I think its because it is still using regular CDMA 1x. Verizon does not plan to upgrade their CDMA 1x network since their plans are to move to VoLTE once LTE is blanketed across the nation.
Once Sprint implements CDMA 1x Advanced on their network vision towers which allows for more 3 times more resources for EVDO since 1x voice will now use only 1/4 of the amount of resources than regular CDMA 1x, then SVDO should be more feasible to ensure a good user experience with both voice and data quality.
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I'd rather take slow data while on the phone then no data anyday...what goes on in the minds of people that make these ridiculous decisions sometimes ...
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codee said:
I'd rather take slow data while on the phone then no data anyday...what goes on in the minds of people that make these ridiculous decisions sometimes ...
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Wifi is a good option
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okay, but here's my thing, when are you ever going to need the option to surf and be on the phone at the same time??? 9 times out of 10 the phone is basically on your face
A2CKilla said:
okay, but here's my thing, when are you ever going to need the option to surf and be on the phone at the same time??? 9 times out of 10 the phone is basically on your face
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9 times out of 10 for me the phone is on speaker phone. I hate holding it to my ear, I can feel the cancer setting in. lol
or bluetooth
-DJ
A2CKilla said:
okay, but here's my thing, when are you ever going to need the option to surf and be on the phone at the same time??? 9 times out of 10 the phone is basically on your face
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Just needed it now. Was on a con call and someone emailed a word doc for everyone to review. I turned on 4g so i didn't have to drop off the call to synch email.
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I'm in a decent LTE area (DFW). Why can I have crappy 4G data and can't load anything. Then I dial *#*#4636#*#* and change to LTE ONLY and it loads LTE and extremely fast, but obviously can't accept calls. Why does the LTE/GSM not just stick on LTE instead of going 4G -_-
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Do you have the Google edition one?
Sent from my HTC One using Tapatalk
Yes, more info about the device please.
dotson817 said:
I'm in a decent LTE area (DFW). Why can I have crappy 4G data and can't load anything. Then I dial *#*#4636#*#* and change to LTE ONLY and it loads LTE and extremely fast, but obviously can't accept calls. Why does the LTE/GSM not just stick on LTE instead of going 4G -_-
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No I have the official T-Mobile version, it is running the latest firmware and radio as of last week. Running AOSP ROM AICP.
I mean it could possibly be due to them working on towers but it still seems weird that the phone wouldn't try to connect to LTE when ever it is possibly available. It might be a placaebo effect, but it just seems like the phone has been having way more delays loading things, even if the ping is low in Speed Test.
dotson817 said:
I'm in a decent LTE area (DFW). Why can I have crappy 4G data and can't load anything. Then I dial *#*#4636#*#* and change to LTE ONLY and it loads LTE and extremely fast, but obviously can't accept calls. Why does the LTE/GSM not just stick on LTE instead of going 4G -_-
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When the phone is set to LTE/GSM it will monitor signal thresholds to try and keep you from having a poor experience on LTE at the fringe. So that if it detects your LTE signal is low it will move over to 4G or even 2G to try and provide you a better experience. When you set it to LTE only then it stays on LTE as long as you have usable signal.
T-Mobile probably has the threshold set too conservative, but that doesn't explain your poor experience on 4g (HSPA). I live in DFW and my HSPA service is fast.
Im in Dallas. Main travel area is old east dallas and north central / north east dallas..
I can tell you that im happy with both HSDPA+ and LTE with them.
on the rare occasion i have had a reception / speed issue i find that power cycling my phone fixed it. Also make sure if you do that you have FastBoot disabled.
Thats under power settings, make sure its not checked.
IAmSixNine said:
Also make sure if you do that you have FastBoot disabled.
Thats under power settings, make sure its not checked.
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What's wrong with using Fast Boot?
it doesnt shut down apps properly..
its similar to hibernation.
Good to know, thanks.