3G and 4G with AT&T. - Xiaomi Mi A3 Questions & Answers

I'm in the USA. Got this phone, put my FreedomPop SIM in (a AT&T MVNO).
And pretty much everywhere in my city it stayed at 3G.
I ported my number to Red Pocket (another AT&T MNVO) because I was sick of FreedomPop's messaging app you're forced to use.
With the RP SIM, same thing, mostly 3G.
I know this phone doesn't support AT&T's main LTE band 12/17, but supports 2,4 and 5.
So, playing around with settings (*#*#4636#*#*) I changed Set Preferred Network Type to: LTE/UMTS auto and it changed from 3G 850MHz (Band 5) to 4G Band 2.
Will it fall back to 3G when it needs to with this setting?

debido666 said:
I'm in the USA. Got this phone, put my FreedomPop SIM in (a AT&T MVNO).
And pretty much everywhere in my city it stayed at 3G.
I ported my number to Red Pocket (another AT&T MNVO) because I was sick of FreedomPop's messaging app you're forced to use.
With the RP SIM, same thing, mostly 3G.
I know this phone doesn't support AT&T's main LTE band 12/17, but supports 2,4 and 5.
So, playing around with settings (*#*#4636#*#*) I changed Set Preferred Network Type to: LTE/UMTS auto and it changed from 3G 850MHz (Band 5) to 4G Band 2.
Will it fall back to 3G when it needs to with this setting?
Click to expand...
Click to collapse
OK, I changed my Preferred network type from 4G/3G/2G to 3G/2G and it automatically changed to 3G.
Changed back, and back on 4G.
Think I'll be OK.
Something to check for fellow US users that might have this issue.

I'm also in the U.S.and have freedompop but I get 4G. At least it says 4G in the status (not LTE). I don't know whether I'm actually getting 4G speed. Seems fast enough.
Good to know this trick, in any event
Thanks

barth2 said:
I'm also in the U.S.and have freedompop but I get 4G. At least it says 4G in the status (not LTE). I don't know whether I'm actually getting 4G speed. Seems fast enough.
Good to know this trick, in any event
Thanks
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debido666 said:
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Yeah I know about speed test. I just didn't want to blow through my data cap lol I'm a cheap bastard.

Related

[Q] AT&T User Roaming on AT&T?

I've racked my brain on this for hours, searched and searched and come up empty, now I'm putting it to everyone here for some help.
Today, my phone has been saying that I'm roaming, no matter what network I'm connected to. I'm on AT&T (have been since 2005) and haven't had this problem up until today. I'd expect it to display roaming when I'm on a partner network (US Cellular/UNICEL), but now it's doing it when connected to AT&T's towers and I can't use any mobile data.
I hadn't changed ANYTHING today (radio, ROM, APN settings, etc.) before it happened. I've tried several things in an attempt to fix it, as well: switching from CM7 (my current ROM) back to Aura; reflashing the latest AT&T radio (from both the CM7 post as well as kenn's Alien post); resetting the APN list to default; manually entering the 4 AT&T APNs (US, US HSDPA, US Tether, and US MMS).
I'm at a total loss and need some fresh minds to take a crack at this too.
Here's what my current "About Phone" looks like:
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Try to restore default apn's. the stock AT&T ones, not the single one that comes with cm7
Sent from my MB860 using xda premium
I had a similar issue once when my father and I were on a long trip. Both of our phones just stopped having a data (and probably voice too). Mine was running CM7 while his was stock gingerbread. I had to fix both by enabling international roaming and this remained a problem for several hours until either time or distance fixed the problem.
Essentially it looks like AT&T was actually the problem since we were in the middle of Wisconsin in an area that had pretty good signal. We never saw an issue on the bill and once international roaming was turned on my data speeds were perfectly acceptable.
I know it isn't the same issue, but if your phone functions normally then I wouldn't worry about it unless it takes more than a couple of days to clear up.
Alcapone263 said:
Try to restore default apn's. the stock AT&T ones, not the single one that comes with cm7
Sent from my MB860 using xda premium
Click to expand...
Click to collapse
Tried restoring using the CWM zip found here. No change.
tapeworm_george said:
I had to fix both by enabling international roaming and this remained a problem for several hours until either time or distance fixed the problem.
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Click to collapse
The thing is, I haven't travelled at all; I'm in my home area. It's good to hear that you were able to set International Roaming without being charged, though. I'm hoping it's just a problem on AT&T's end, but I haven't heard anyone else complaining about it yet...
Called AT&T to verify no towers down in your area? You stated you have stayed in your home area. It's entirely possible there is work going on on the tower you usually connect through, and this has resulted in you being on a partner tower and roaming. Just a thought.

[Q] True Connection (3g and H+)

So I just finished flashing the True Connection mod from UnNamed and noticed I am on 3g.
Yesterday I noticed when I was a few cities up north from my area my signal bar turned green, does that mean it was actually H+ or I just had really good connection?
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I never had it shown green and drove mostly all over south Florida except one area in Dania Beach so I was rather confused if it was bad or good till I Googled it.
My speeds are great and I really don't need them faster, its twice as fast as my iPhone 3gs, when downloading files its around 600kb/s which is plenty fast.
Wifi Tethering:
Right now its bouncing between H+ and 3g depending where I am in the house.
So I am a little confused...
Im curious...what did you expect from the true connection mod?
Sent from my SAMSUNG-SGH-I777 using XDA App
defnow said:
Im curious...what did you expect from the true connection mod?
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Well I didn't know what it was till I read this:
Simba501 said:
By default, the status bar shows HSPA (H) as the connection even if UMTS (3G) is active. HSPA is only in use when data is actually being used. In idle, it goes back to UMTS (3G). The addon will show this if you flash it. In areas where there is only UMTS (3G), this will be indicated by the addon as well. AT&T defaults to showing HSPA for everything because they want to pull the wool over their users' eyes, and make them believe they have HSPA everywhere they go.
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I just don't get how the signal and speeds relate.
I would think a good connection would get you the best speeds but maybe I am missing a whole lot more stuff that I don't understand.
LiLChris06 said:
I just don't get how the signal and speeds relate.
I would think a good connection would get you the best speeds but maybe I am missing a whole lot more stuff that I don't understand.
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Hey LilChris06, are you the mod from OCN?
On topic:
Samsung's default setting is to give you the H+ symbol at all times, even though you may be connected to 4g or 3g. The "true connection mod" you flashed just changes the symbol to show you what you really are on, as the quote states.
As for your question, there are more complications to it, but generally yes, good connection does mean good speeds.
So you got 3G = UMTS
and the H = HSDPA, which in laymens would a "3.5G" in relation to 3G
H+ is an upgraded version of HSDPA, which occurred in 2008.
http://en.wikipedia.org/wiki/High-Speed_Downlink_Packet_Access

[Q] T-mobile USA LTE connection - help needed

I have a D6503 with A.0.167 from taiwan. When I use it on T-mobile network, the preferred network mode is 4G(preferred)/WCDMA/GSM. I never see an option with LTE in it. Also, the signal is very weak. I'm under the impression that the phone never connects on the LTE network.
Does anyone know what I shall do to fix the problem? Thanks!
kadams80 said:
I have a D6503 with A.0.167 from taiwan. When I use it on T-mobile network, the preferred network mode is 4G(preferred)/WCDMA/GSM. I never see an option with LTE in it. Also, the signal is very weak. I'm under the impression that the phone never connects on the LTE network.
Does anyone know what I shall do to fix the problem? Thanks!
Click to expand...
Click to collapse
Are you sure this is a D6503? I use my imported D6503 with T-Mobile and LTE works fine on 23.0.1.A.0.167-
http://www.speedtest.net/my-result/a/1050817061
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T-Mobile's network doesn't have the strongest coverage, but whenever you have an LTE signal it should connect that way.
My options look like this:
Preferred network mode
-WCDMA only
-GSM only
-WCDMA (preferred)/GSM
-LTE (preferred)/WCDMA/GSM
I'm positive. I got the information by dialing *#*#SERVICE#*#*.
Could you please tell me your customization version number? It can be found by dialing *#*#SERVICE#*#*, and then select SERVICE INFO -> SOFTWARE INFO. Mine is 1281-5456_R1B, which is for phones used in Taiwan. I am wondering whether that matters and whether I should flash a different firmware.
sam_conrad said:
Are you sure this is a D6503? I use my imported D6503 with T-Mobile and LTE works fine on 23.0.1.A.0.167-
T-Mobile's network doesn't have the strongest coverage, but whenever you have an LTE signal it should connect that way.
My options look like this:
Preferred network mode
-WCDMA only
-GSM only
-WCDMA (preferred)/GSM
-LTE (preferred)/WCDMA/GSM
Click to expand...
Click to collapse
I have all the options except the last one. Mine reads 4G(preferred)/WCDMA/GSM.
kadams80 said:
I have a D6503 with A.0.167 from taiwan. When I use it on T-mobile network, the preferred network mode is 4G(preferred)/WCDMA/GSM. I never see an option with LTE in it. Also, the signal is very weak. I'm under the impression that the phone never connects on the LTE network.
Does anyone know what I shall do to fix the problem? Thanks!
Click to expand...
Click to collapse
kadams80 said:
I have all the options except the last one. Mine reads 4G(preferred)/WCDMA/GSM.
Click to expand...
Click to collapse
Theres no problem.. Your connected to LTE.. 4G IS LTE.
hyelton said:
Theres no problem.. Your connected to LTE.. 4G IS LTE.
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Got it. Thanks!
kadams80 said:
Got it. Thanks!
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Click to collapse
USA its called 4G which is only 3G/3.5G. Which I don't agree with.
While in other countries 3G/3.5G is called H+/3G
hyelton said:
USA its called 4G which is only 3G/3.5G. Which I don't agree with.
While in other countries 3G/3.5G is called H+/3G
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Click to collapse
Understood now. When the signal was good, I got 24Mbps down and 12Mbps up. So it's good.
hyelton said:
USA its called 4G which is only 3G/3.5G. Which I don't agree with.
While in other countries 3G/3.5G is called H+/3G
Click to expand...
Click to collapse
What is interesting is that he has a Taiwan ROM and Sony has the LTE / 4G terminology is swapped by geographical area.
kadams80 said:
Understood now. When the signal was good, I got 24Mbps down and 12Mbps up. So it's good.
Click to expand...
Click to collapse
It wouldn't be impossible to get 24 Mbps down on T-Mobile's "4G" HSPA+ network, I've gotten 23 Mbps a couple times. 12 Mbps upload would be a bit of a stretch, usually only 2-4 Mbps are seen.
My phone has customization version 1281-1981_R1B. I can't quite remember off the top of my head but I believe this phone was destined for the Indonesian market.

Verizon phone on tmobile

Can anyone tell me what settings I need to change to use a t-mobile Sim with my Verizon v10?
you need to change the APN. its a bit of a pain but it does work. At least it did on my old S4
Do u know what the apn settings should be?
Kboucher said:
Do u know what the apn settings should be?
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Hope this helps.. I'm curious to know if vzw v10 works well on T-Mobile.. Let us know how APN works for you...
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BeameD From My LG V10... The one with the ALWAYS ON SCREEN... Watching me.. ?
Thank you chiikko561, that helped.
I set up the APN. I was only getting Tmobile's Edge network. If I changed the network mode to LTE/CDMA if forces it to LTE but I cannot make calls or txt. I am trying to find an option for my Verizon unlimited data plan. I cannot get anything but satellite for internet where I live. This phone would become our home internet hotspot. I don't really need talk/txt on this phone so I guess LTE would work for me, just want to solve it. Any suggestions appreciated.
Kboucher said:
Thank you chiikko561, that helped.
I set up the APN. I was only getting Tmobile's Edge network. If I changed the network mode to LTE/CDMA if forces it to LTE but I cannot make calls or txt. I am trying to find an option for my Verizon unlimited data plan. I cannot get anything but satellite for internet where I live. This phone would become our home internet hotspot. I don't really need talk/txt on this phone so I guess LTE would work for me, just want to solve it. Any suggestions appreciated.
Click to expand...
Click to collapse
Do did changing the apn work for you do make calls and use LTE? Or are you still only able to do one and not the other without changing the network mode?
Did you turn volte off?
Phone does not have band 12.. No Volte.. That could be your issue
Sent from my SM-G925T using Tapatalk
seniorstew said:
Phone does not have band 12.. No Volte.. That could be your issue
Sent from my SM-G925T using Tapatalk
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Click to collapse
VoLTE is not dependent upon band 12. I have TMO and am on band 4 with VoLTE...
It's strange but I think Verizon is behind this issue because I can get LTE using the LTE/GSM/UMTS for about 30 seconds then it just drops from 4G LTE to H. When I turn off Mobile Data then turn it back on it will see T-mobile's 4G then drop again.
Am trying to do switch also my V10 from verizon to tmobile when I put my sim in it automatically switches to tmobile apn and does the same it shows 4g/let then goes to H any suggestions....
You may never get full function of the Verizon phone on T-Mobile.
Reason is Verizon runs on CDMA and T-Mobile runs on GSM.
And I don't think the V10 has the ability to be both.

x822: no lte

I have x822 and from the begining I didn't have LTE signal thats why started to change roms. Now I have CM13 on it, but still no LTE. When I change for prefered LTE I didn't have any signal... Apn is good. Don't know what is wrong, maybe someone can solve that problem or have same? Can it be hardware problem? Also signal is all the time changing between 3G and H+. Same SIM card in HTC M8 in same place has good LTE signal. I tried both SIM card slots, but nothing happend, still no lte signal.
Enzo_84 said:
I have x822 and from the begining I didn't have LTE signal thats why started to change roms. Now I have CM13 on it, but still no LTE. When I change for prefered lte I didn't have any signal... Apn is good, I don't know what is wrong, maybe some one can solve that problem or have same? Can it be hardware problem? Also signal is all the time changing between 3G and H+
Click to expand...
Click to collapse
First thing I'd suggest is going to your Telco and getting a new sim unless it is already new.
mikeysteele said:
First thing I'd suggest is going to your Telco and getting a new sim unless it is already new.
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but in HTC M8 it works.
Poland LTE bands: 800, 1800, 2600
Everything is ok for me with LTE. 800 and 1800 tested, no 2600 signal here yet.
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Sent from my Le X820 using Tapatalk
I found this:
Telco does not accepte IMEI in 86 only in 35.
can it be the reason?
I dont know but both of my IMEI starts with 86.
Why don't you call them, just to check and eliminate SIM card problem?
Second, maybe there is some kind of difference in modems, X820 vs X822. Do you have same Baseband version as i do or?
Sent from my Le X820 using Tapatalk
Baseband Is same. I don't NKWD wiat happened, but today I start to have LTE, strange.

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