Strange signal problem - Galaxy S II Q&A, Help & Troubleshooting

On my i9100 I have a really strange signal problem my suspicion is a hardware issue.
Let's start with the actual problem, from the title you can tell its signal related, it constantly is really low but in some places full. In places where other people on android get full signal I get no signal what so ever. I have tried a custom ROM (super nexus JB 4.1.2), I've also tried a few modems giving each a few days to test but they all act the same so I don't really know what to do in software terms. Any ideas anyone?
Sent from my GT-I9100

wolfdra said:
On my i9100 I have a really strange signal problem my suspicion is a hardware issue.
Let's start with the actual problem, from the title you can tell its signal related, it constantly is really low but in some places full. In places where other people on android get full signal I get no signal what so ever. I have tried a custom ROM (super nexus JB 4.1.2), I've also tried a few modems giving each a few days to test but they all act the same so I don't really know what to do in software terms. Any ideas anyone?
Sent from my GT-I9100
Click to expand...
Click to collapse
If you already tried different modems (and RILs?!) it could be a carrier or hardware issue.
If you want to read a little bit more about modems and RILs, have a look here => http://forum.xda-developers.com/showthread.php?t=1881304

It_ler said:
If you already tried different modems (and RILs?!) it could be a carrier or hardware issue.
If you want to read a little bit more about modems and RILs, have a look here => http://forum.xda-developers.com/showthread.php?t=1881304
Click to expand...
Click to collapse
Yeah I used getRIL for the RILs and as I say there's no difference, also I've tried sims from different networks in my phone and doesn't make a difference but they work perfectly in other phones so it mist be a hardware issue
Sent from my GT-I9100

Related

[Q] Vodafone Australia

Hi guys,
I recently noticed that the Vodafone reception has been very, very bad. I'm talking 1 - 2 bars MAX and the rest of the time absolutely no reception, anywhere.
Is anyone having this problem? What could be the cause of this? I have a brand new SIM card as well - and on 2.3.7 MIUI ROM. Any help will be appreciated and thanked
Try flashing a different RADIO/MODEM package... Different ones are meant for different regions and yield varying results as far as reception and call quality are concerned. And there's nothing like the "best radio"... That's like asking what's the best religion. It's all about experimentation.
Try KJ1 from here. This is the best modem I've tried/used over the past 2 and a half months. I'm in Geelong and this gives me the best signal strength/coverage & data speeds. KI2 from Cellcom Israel from here was also good.
It could also be a Vodafone lack of coverage/capacity issue as well.
If you find neither of these improves the situation, do what Prassad suggests & try every modem you can get your hands on.
gspotr said:
Hi guys,
I recently noticed that the Vodafone reception has been very, very bad. I'm talking 1 - 2 bars MAX and the rest of the time absolutely no reception, anywhere.
Is anyone having this problem? What could be the cause of this? I have a brand new SIM card as well - and on 2.3.7 MIUI ROM. Any help will be appreciated and thanked
Click to expand...
Click to collapse
Prasad007 said:
Try flashing a different RADIO/MODEM package... Different ones are meant for different regions and yield varying results as far as reception and call quality are concerned. And there's nothing like the "best radio"... That's like asking what's the best religion. It's all about experimentation.
Click to expand...
Click to collapse
Will that affect the way my current NDT MIUI ROM operates? and do I just flash it through Odin or CWM?
MistahBungle said:
Try KJ1 from here. This is the best modem I've tried/used over the past 2 and a half months. I'm in Geelong and this gives me the best signal strength/coverage & data speeds. KI2 from Cellcom Israel from here was also good.
It could also be a Vodafone lack of coverage/capacity issue as well.
If you find neither of these improves the situation, do what Prassad suggests & try every modem you can get your hands on.
Click to expand...
Click to collapse
My mates on the same ROM and he has full bars I will give the flashing a new modem a go.. thanks bud.
MistahBungle said:
Try KJ1 from here. This is the best modem I've tried/used over the past 2 and a half months. I'm in Geelong and this gives me the best signal strength/coverage & data speeds. KI2 from Cellcom Israel from here was also good.
It could also be a Vodafone lack of coverage/capacity issue as well.
If you find neither of these improves the situation, do what Prassad suggests & try every modem you can get your hands on.
Click to expand...
Click to collapse
Took ur advise and so far so good.. hopefully stays full bar
Sent from my GT-I9100
Very good Let us know how it goes over a few days. Also, this thread is a good resource for AU SGS2 users.
gspotr said:
Took ur advise and so far so good.. hopefully stays full bar
Sent from my GT-I9100
Click to expand...
Click to collapse
MistahBungle said:
Very good Let us know how it goes over a few days. Also, this thread is a good resource for AU SGS2 users.
Click to expand...
Click to collapse
Oh mate loving it.. I'm in a place where the reception is always dead. And its on fulls with 3G
Thanks heaps champ!
Sent from my GT-I9100
Glad that's solved your problem. You're welcome
gspotr said:
Oh mate loving it.. I'm in a place where the reception is always dead. And its on fulls with 3G
Thanks heaps champ!
Sent from my GT-I9100
Click to expand...
Click to collapse
Both vodafone and Telstra sell the T model i9100 galaxy which requires a T modem. Whenever I flash a new rom I reflash with a T modem to get decent reception back.
Sent from my GT-I9100
And funnily enough, the thread which has a link to the modem I suggest he flash has a first line that reads "I9100T Modem from Vodafone Australia"

[Q] Signal Strenght Reports Wrong

Hi there.
I got this problem which has been annoying me for quite a while, where the signal strenght given in dbm, is reported wrong. It can only show 4 values:
-89dBm
-95dBm
-101dBm
-107dBm
Even when i am close to a transmitter, it gives me -89dBm, where my previous GS would show -51dBm.
I assume this is only being shown as -89 but in fact i have better signal, but is there a way to fix this?
I found some posts on xda with others having the same problem but no solutions found yet.
ROM, Kernel & Modem changes have no effect, they all show me -89.
Thanks,
Ben
Whick firmware does the phone have now? Because i don't have this problem
I have ran Slim ICS, Hydrog3n ICS and now it is on Resurrection Remix.
All roms gave the same results, the current modem is NELP2, though i have tried like 7 which gave me the same result. Also, now i am running Siyah kernel, but i have ran Fluxi, CM standard kernels etc.
My neighbour's phone which is running WIUI seems to also have the same behaviour as mine.
I'm aware this thread is old as hell. But hey there's no answer to the question, I'm having the exact same problem. Even driving to the tower I still get exactly 89dBm when my other S2 goes around 60dBm
hbhorat said:
I'm aware this thread is old as hell. But hey there's no answer to the question, I'm having the exact same problem. Even driving to the tower I still get exactly 89dBm when my other S2 goes around 60dBm
Click to expand...
Click to collapse
It will be down to your modem version which has been updated at some point by a rom. Go to the modems thread (use search) and try another.
TheATHEiST said:
It will be down to your modem version which has been updated at some point by a rom. Go to the modems thread (use search) and try another.
Click to expand...
Click to collapse
Running the same modem on both my S2's (KH3)

Question about modems.

I know this may be a bit of a noob question but can someone please explain to me what modems are and what affect they have as I have noticed there is a thread with a lot of different ones know it.
I am running the latest jellybean official Rom on my handset. I am in the UK and on the orange network.
I Havre had many occasions where my phone shows I have signal and that I am either showing 3g or h+ however when I try to load some pages or refresh pages on the xda app that it will just churn over and not actually load anything. The data arrows dk not show both moving (often just one) and it just seems like it has frozen. I the find myself having to leave the page/app and restart it.
Is this a modem problem? Which one should I use if it is?
Thanks for the help.
Sent from my GT-I9300 using xda premium
I don't have an answer for you, but I get the same thing on ATT in the US a lot.
hpsauce37 said:
I know this may be a bit of a noob question but can someone please explain to me what modems are and what affect they have as I have noticed there is a thread with a lot of different ones know it.
Modems / radio/baseband is what communicates with your phone network .
I am running the latest jellybean official Rom on my handset. I am in the UK and on the orange network.
You are not using official JB its not released .
Is this a modem problem? Which one should I use if it is?
Network problems try different modems starting with the posted JB modems followed by the ICS modems from the modem posts .
jje
Click to expand...
Click to collapse

[Q] Modem/Connectivity issue

Hello people,
For the past few months I'm having this issue which I find extremely [email protected]!!
Every few minutes, my phones just loses internet connectivity - the 3g signal appears to be normal during all the time, thing is, whenever I try to use any internet application - it just hangs. and then, after a minute or so, connectivity is back(again, for a few minutes).
I have tried flashing so many versions of modems - some improved it a little but most of them didn't help at all, or even made it worse.
Hopefully someone could help me with that as I'm that close to give up on this and buy a new phone.
Thanks in advanced.
Nir.
Which firmware are you running on your phone? What modem do you have right now and where do you live? Do you have problems with all apps that use internet-connection? Do the problems dissapear when you use wifi?
Just some information would be usefull
Donnie Sins said:
Which firmware are you running on your phone? What modem do you have right now and where do you live? Do you have problems with all apps that use internet-connection? Do the problems dissapear when you use wifi?
Just some information would be usefull
Click to expand...
Click to collapse
Yop.. forgot to mention a 'few' things...
Model: GT-I9100
Rom: RootBox V3.8
Kernel: 3.0.31-CM-g7ce58e6
Baseband: I9100DXLPB
Android version: 4.2.2
I live in Israel, bought the phone in Thailand.
I tried flashing all available Israeli modems(from various cell phone providers) - none helped.
Problem disappear when I move to WiFi - as 3g connectivity moves to background...
Thanks.
I assume you've read the Rootbox threads to see if other people experience signalproblems?
Did you compare the connectivity with other roms? Stock-based roms for example...
Donnie Sins said:
I assume you've read the Rootbox threads to see if other people experience signalproblems?
Did you compare the connectivity with other roms? Stock-based roms for example...
Click to expand...
Click to collapse
I've been hovering the internet for weeks in search for a solution..
That's not a RootBox issue in particular as I tried using various roms...
niiiro said:
I've been hovering the internet for weeks in search for a solution..
That's not a RootBox issue in particular as I tried using various roms...
Click to expand...
Click to collapse
That seems quite weird.. The only thing I can come up with is 1) a hardware problem, or 2) you live in an area where the signal is crap
Hopefully someone else knows anything.. Good luck.
Donnie Sins said:
That seems quite weird.. The only thing I can come up with is 1) a hardware problem, or 2) you live in an area where the signal is crap
Hopefully someone else knows anything.. Good luck.
Click to expand...
Click to collapse
Neither of them thanks anyways.
Anyone else...?
If you've only tried flashing the modems bundled with stock roms from Israeli carriers, you haven't done nearly enough. There are literally dozens of modems available, you need to start flashing as many as you need to. This isn't going to fix itself magically.
MistahBungle said:
If you've only tried flashing the modems bundled with stock roms from Israeli carriers, you haven't done nearly enough. There are literally dozens of modems available, you need to start flashing as many as you need to. This isn't going to fix itself magically.
Click to expand...
Click to collapse
I haven't flashed only Israeli modems but others as well. I've tried around 20 so far...
Question is, which direction should I choose? should I look for Thai modems or IL?
That depends. I know Israeli carriers sold (still sell ?) the I9100T, are you sure you don't have one of these ? If that's the case, I'd be trying modems bundled with roms released by the Australian & NZ carriers which sold the I9100T (I have one), and yes, the Thai ones as well.
If you do have an I9100, then keep trying any/every modem you can get your hands on. If it's not a carrier-side issue, this is really all you can try, unless you want to start messing around with RIL's as well. I've not found any difference in connectivity doing this personally (tho many people have) but if you get to the point of trying every single modem & you're sure it isn't a carrier issue, you might as well try. But I would leave this till last given many people find their connectivity messed up even worse by flashing an incompatible RIL.

GPS and Modem versions - test

I recently had najor problems with gps reception and locking.
I flashed many different roms in trying to solve it.
I searched the forums and saw many suggestions, all of them spoke about tweaking or using a different gps.conf files.
Tried many of them and nothing helped.
Then I flashed a rom that changed the modem also and what do you know, gps was working again. Good reception and fast locking time.
It also was a sammy based rom and not an aosp/aokp/cm rom.
The thing is that I think the modem was the main solution. Maybe the sammy rom helped too since I did get a response from someone saying that there is a piece of software in sammy roms that is needed by the gps and can not be integrated in the aosp aokp cm roms.
Since then I am kind of reluctant to try another rom, maybe an aosp one with this modem and see if the gps works good.
Maybe a group of people can check this, me included, and report thier results with different modems and roms.
Since I use my gps daily it realy was a difficult time for me when I experienced these problems.
So this topic may become a good guide to people with s2 gps problems.
My problematic modem was xms2 while good ones were xlq6, kh3 and xlph. Also on a friend s2 xls8 worked fine.
A good thing will be to include your location as results may vary according to it.
My location is Israel.
Thanks
Sent from my GT-I9100 using Tapatalk 2
It's not the modem, GPS has nothing to do with which modem you use.
It's probably more with the fact you went back to a Sammy based rom instead of aosp/aokp/cm
Damienoid said:
It's not the modem, GPS has nothing to do with which modem you use.
It's probably more with the fact you went back to a Sammy based rom instead of aosp/aokp/cm
Click to expand...
Click to collapse
From my experience with embeded modems they usually contains the gps receiver as well, this is why I believe there is a connection but it can be also be related to the rom.
This is why I asked other users to try it out so we can get more statistics on the issue.
Thanks
Sent from my GT-I9100 using Tapatalk 2
I did some testings today and here are my resuls.
It seems tat there ae two problems one is the modem used the other is the rom.
Changing the modem did help a lot on aosp/aokp/cm roms in terms of reception and locking time. It seems though that after dalvik wipe it will take much longer to lock the firsttime, then it is much faster took my device to lock about 17 to 30 seconds while on the first time it took as mch as 2 minutes.
But on these roms it seems that less satellites are viewed and used, they only managed to use 4 or 5 ay most when there where between 7 to 9 satellites visible.
Sammy roms used all or most of the satellites visible, which led to a more accurate locking.
Good modems where KH3, XLPH, XLQ6, XLS8. I believe that KH3 was the best followed by XLPH.
Bad modem XMS2.
ROMS Avatar rom for aosp/aokp/cm based, ROMs4 and vivik for sammy based.
Regards and hope it will be of use for someone.
Sent from my GT-I9100 using Tapatalk 2
how can I know
hi guys,
I'm struggling with my weak GPS signal too.
and I was googling looking for something that could help me and here I am.
but, as a noob, I don't even know how to know my modem model, can you help me out?
Thx in advance!
marcosnanny said:
hi guys,
I'm struggling with my weak GPS signal too.
and I was googling looking for something that could help me and here I am.
but, as a noob, I don't even know how to know my modem model, can you help me out?
Thx in advance!
Click to expand...
Click to collapse
Go to settings->About phone and look at the Baseband.
Sent from my GT-I9100 using Tapatalk 2
E120LKLJMA2
This is my modem then.
Can I flash any modem, or it must be specific to my phone's model (S2 SHV E120L)?
Sent from my SHV-E120L using xda app-developers app
marcosnanny said:
E120LKLJMA2
This is my modem then.
Can I flash any modem, or it must be specific to my phone's model (S2 SHV E120L)?
Sent from my SHV-E120L using xda app-developers app
Click to expand...
Click to collapse
I believe you have to flash a modem designed for your device specifically.
I suppose you will find it in your device forum.
Regards
Sent from my GT-I9100 using Tapatalk 2

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