Develop Bugs

[Q] Thinking about exchanging my CDMA GN due to LTE signal drop

I've been using the Galaxy Nexus for about a month or so and have recently started to notice that the 4G signal will drop whenever I turn on the screen after some time in deep sleep. The signal meter will be fine, until I actually try to use some data. It typically takes about a minute to reacquire a signal, but the phone is essentially useless during that time.
As you can see in the screenshot, there are several red spots where the signal dropped out. I am not in a poor coverage area, and others with the same device do not have these issues. I saw this with a rooted 4.0.2 OTA and am still seeing it with a rooted, deodexed 4.0.4 rom (http://forum.xda-developers.com/showthread.php?t=1481613).
What do people think? Will exchanging the phone possible fix the issue? Is there anything Verizon can do to try and help me out? I'm basically just spitballing here, but this problem is making my phone very frustrating to use.

Are you rooted or stock? I don't have any issues with my 4G on stock or rooted with Gummy 0.7.6. I had an issue with an earlier root where my 4G would drop. I would disable / re-enable and it would start to work again. Maybe try rooting if you are not rooted????

zombiehaven said:
Are you rooted or stock? I don't have any issues with my 4G on stock or rooted with Gummy 0.7.6. I had an issue with an earlier root where my 4G would drop. I would disable / re-enable and it would start to work again. Maybe try rooting if you are not rooted????
Click to expand...
Click to collapse
Yes, I see this on rooted stock, as well as the ROM I referenced in the original post (supposedly deodexed 4.0.4 stock ROM)
EDIT: From several posts in the other thread, this issue is not isolated to me or my hardware so I probably won't bother exchanging the phone.

History of Signal ?
jjohns63 said:
I've been using the Galaxy Nexus for about a month or so and have recently started to notice that the 4G signal will drop whenever I turn on the screen after some time in deep sleep. The signal meter will be fine, until I actually try to use some data. It typically takes about a minute to reacquire a signal, but the phone is essentially useless during that time.
As you can see in the screenshot, there are several red spots where the signal dropped out. I am not in a poor coverage area, and others with the same device do not have these issues. I saw this with a rooted 4.0.2 OTA and am still seeing it with a rooted, deodexed 4.0.4 rom (http://forum.xda-developers.com/showthread.php?t=1481613).
What do people think? Will exchanging the phone possible fix the issue? Is there anything Verizon can do to try and help me out? I'm basically just spitballing here, but this problem is making my phone very frustrating to use.
Click to expand...
Click to collapse
Can you please tell me where you get that HISTORY screen from. Ive checked all menus in settings and I can not find it anywhere.
EDIT... Please ignore my post... I found it...

So, I'm having the same exact problems but i did a log cat to see what might be culprit.
I have narrowed it down to this:
02-08 11:21:51.912 E/IMSFW (415): IIL: Disconnected from '7467' socket
still have no idea what can cause it yet.
also if you switch to 3g it seems it doesn't happen so maybe its a sim problem on verizons lte network end?
11:22:40.029 E/IMSFW (415): ImsSMSInterface: Registration failed, go for retrying if isim nounce present
that's what i found so if anyone can clarify and maybe see if it is really on Verizons end as this is the 4th phone that has had this problem.

that1techguy said:
So, I'm having the same exact problems but i did a log cat to see what might be culprit.
I have narrowed it down to this:
02-08 11:21:51.912 E/IMSFW (415): IIL: Disconnected from '7467' socket
still have no idea what can cause it yet.
also if you switch to 3g it seems it doesn't happen so maybe its a sim problem on verizons lte network end?
11:22:40.029 E/IMSFW (415): ImsSMSInterface: Registration failed, go for retrying if isim nounce present
that's what i found so if anyone can clarify and maybe see if it is really on Verizons end as this is the 4th phone that has had this problem.
Click to expand...
Click to collapse
Hey fellas, I'm posting in this thread because it relates to the issue I'm facing. Coming from the Thunderbolt, I had no problems holding onto a LTE signal in Atlanta, but with my GNex, the signal just drops a lot (every half hour or so maybe), at work, at the store, wherever. It shows an empty signal bar with a small x, and says 'Searching for Service'.
This seems to happen only when I have it in LTE mode. I switched to CDMA under the 'Mobile Networks' settings window, and it was able to hold on to the 3G signal all day. I am starting to think if it is a LTE sim card authentication issue.
I'm going to VZW to see what I can do (I'm still within the 14-day window).

I'm having the Same issue holding onto a 4g signal in Savannah and Atlanta, cdma only is fine. Let me know what Verizon tells u cause they basically told me to wait for an update
Sent from my Galaxy Nexus using Tapatalk

xratede said:
I'm having the Same issue holding onto a 4g signal in Savannah and Atlanta, cdma only is fine. Let me know what Verizon tells u cause they basically told me to wait for an update
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Just came back, basically they said they can't do anything unless they replicate the problem, which they couldn't. (it was a random problem.). They told me to call customer service when I got that issue, so I have to see that at work tomorrow.
I tried a suggestion online where I updated my prl from the 15xxx version to the 52642 version. I did this by creating a contact with the following number
*22899
and dialing that contact. It went through a 'activation' process, with some elevator music, and the signal seems to hold.

what25 said:
Just came back, basically they said they can't do anything unless they replicate the problem, which they couldn't. (it was a random problem.). They told me to call customer service when I got that issue, so I have to see that at work tomorrow.
I tried a suggestion online where I updated my prl from the 15xxx version to the 52642 version. I did this by creating a contact with the following number
*22899
and dialing that contact. It went through a 'activation' process, with some elevator music, and the signal seems to hold.
Click to expand...
Click to collapse
Yea I did the prl update and it was fine for awhile but started back again a few hours later
Sent from my Galaxy Nexus using Tapatalk

I've updated to 4.0.4, 4.0.3, flashed just the radios, removed some card, hard reset, factory reset, just about everything u can imagine and still no luck. I'm tempted to file a claim with asurion(purchased gnex from a friend) and see if another gnex works with late but I don't wanna spend $99 for nothing
Sent from my Galaxy Nexus using Tapatalk

xratede said:
Yea I did the prl update and it was fine for awhile but started back again a few hours later
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
To this and post 10, I still have those data issues, but they are much less frequent on the 4.0.2 radio than the 4.0.4.
I got in touch with Verizon wireless online support, and they basically told me to wait till they release a software update. I asked for a new sim card (since I thought it might be LTE authentication issues), and they said it was a software problem, not a SIM problem.
I guess its a wait and see.

[Q] Weak Signal Issues GT-I9250 GSMH

I have been using the GNex for a couple days and it has been a nightmare.
I have no signal whatsoever in my own house. I used to have Galaxy S II and used it at the same place with no issues. I have tried every single radio available for the GNex and they all seem to fail!
I have also installed custom roms, CM9, AOKP, now using Jelly Bean and i love it but the signal..
Does anyone knows if this has a fix?? Or is just dead faulty phone??
Plz help!

deimos86 said:
I have been using the GNex for a couple days and it has been a nightmare.
I have no signal whatsoever in my own house. I used to have Galaxy S II and used it at the same place with no issues. I have tried every single radio available for the GNex and they all seem to fail!
I have also installed custom roms, CM9, AOKP, now using Jelly Bean and i love it but the signal..
Does anyone knows if this has a fix?? Or is just dead faulty phone??
Plz help!
Click to expand...
Click to collapse
what radio are you using? is this a LTE or GSM model?

deimos86 said:
I have been using the GNex for a couple days and it has been a nightmare.
I have no signal whatsoever in my own house. I used to have Galaxy S II and used it at the same place with no issues. I have tried every single radio available for the GNex and they all seem to fail!
I have also installed custom roms, CM9, AOKP, now using Jelly Bean and i love it but the signal..
Does anyone knows if this has a fix?? Or is just dead faulty phone??
Plz help!
Click to expand...
Click to collapse
Who is your carrier and whereabouts are you located?

bk201doesntexist said:
what radio are you using? is this a LTE or GSM model?
Click to expand...
Click to collapse
Clearly says gsm xd

You could ask for a new sim or look at a coverage checker. But it sounds faulty to me :/
Sent from my Galaxy Nexus using xda app-developers app

biscuitownz said:
Clearly says gsm xd
Click to expand...
Click to collapse
Sorry i spaced out
So, gsm model, you on radio LA2? Does it have good network reception elsewhere, or is it just at your home that signal is too weak?
Like the poster before me said, have you tried another sim card? Have you tried placing your current sim card in another phone?
You use stock kernel right? Have you tried a custom kernel with smart reflex activated?
Sent from my i9250

The phone actually gets weak signal and lost of connection everywhere. But since at my house i don't have a GREAT! signal it just vanishes.
The phone was Stock when i bought it and had the Issue it came with XXLA2 Radio and 4.0.4 Lastest ICS Build.
After i noticed the issue i rooted and tried all the radios available and roms with no luck. all leave me with low signal.
I sued to have a GS2 and had 2 to 3 bars at home so its a huge difference .
Now iam running JB 4.1.1 with latest Radio XXLF1 and same issue,
Something i have noticed is that the phone has Very high dBm... compared to other phones from same Provider.
FYI i live in Puerto Rico and the provider is Claro.

bk201doesntexist said:
Sorry i spaced out
So, gsm model, you on radio LA2? Does it have good network reception elsewhere, or is it just at your home that signal is too weak?
Like the poster before me said, have you tried another sim card? Have you tried placing your current sim card in another phone?
You use stock kernel right? Have you tried a custom kernel with smart reflex activated?
Sent from my i9250
Click to expand...
Click to collapse
frankcube said:
Who is your carrier and whereabouts are you located?
Click to expand...
Click to collapse
Located in Puerto Rico the Carrier is Claro. It Runs same Bands as ATT

bk201doesntexist said:
Sorry i spaced out
So, gsm model, you on radio LA2? Does it have good network reception elsewhere, or is it just at your home that signal is too weak?
Like the poster before me said, have you tried another sim card? Have you tried placing your current sim card in another phone?
You use stock kernel right? Have you tried a custom kernel with smart reflex activated?
Sent from my i9250
Click to expand...
Click to collapse
The SIM is the same one i had in my GS2 and had no issues. i have also used other SIM cards and same weak signal. I have tried only Fracescos kernel milestone 4 but i have no idea what smart flex is.. Maybe can help

Screen Shots
Here is some Screens of my connectivity and setup.
View attachment 1192466View attachment 1192467View attachment 1192468
Let me know is someone see something wrong...

deimos86 said:
Here is some Screens of my connectivity and setup.
View attachment 1192466View attachment 1192467View attachment 1192468
Let me know is someone see something wrong...
Click to expand...
Click to collapse
Same problem here with baseband XXLA2 and build IMM76I.
I know there were signal issues with updates from 4.0.2 to 4.0.4 (see here but, if I have understood well, the build IMM76I should have solved that problems.
So the question is: my phone has come out with 4.0.4, XXLA2 and build IMM76I (so already with the fix for signal problems) what could be the problem? Hardware??

the_dark_destructor said:
Same problem here with baseband XXLA2 and build IMM76I.
I know there were signal issues with updates from 4.0.2 to 4.0.4 (see here but, if I have understood well, the build IMM76I should have solved that problems.
So the question is: my phone has come out with 4.0.4, XXLA2 and build IMM76I (so already with the fix for signal problems) what could be the problem? Hardware??
Click to expand...
Click to collapse
Thats what I am afraid off.. I had also XXLA2 and build IMM76I when I bought it, after that i started to install Diff Roms and radios to solve the issue but no luck so far.
I have not seen any issues like this over the internet.. usually with the XXLA2 and build IMM76I everyone is happy so iam afraid this
is just a bad batch of phones.
Witch version do you have and where it has been build. Mine is GT-I9250GSMH from Korea

I'm planning to test some other radio and also intall the JB OTA. I will keep you updated.

Crap! Just updated to 4.1.1 via OTA and the problem is still there! I'm experiencing 10 - 20db less in signal strength than the one I have with a gs2.The baseband now is XXLF1. So I have to assume that is an hw defect and send it to repair? Is anyone experiencing this annoying issue?
the_dark_destructor said:
I'm planning to test some other radio and also intall the JB OTA. I will keep you updated.
Click to expand...
Click to collapse

I had this happen to a white unlocked GSM Galaxy Nexus i purchased. I ended up just sending it in for a replacement. \o/
Seems to be hardware related.

I wonder If there is a way to fix the phone.. If i just knew what piece of hardware is and if it is worth it... I bought it 2nd Hand and dont think its under warranty. Does some one knows where i can send it for repairs to samsung??

deimos86 said:
I wonder If there is a way to fix the phone.. If i just knew what piece of hardware is and if it is worth it... I bought it 2nd Hand and dont think its under warranty. Does some one knows where i can send it for repairs to samsung??
Click to expand...
Click to collapse
I'm more or less in your same situation. Before sending it to repair I would like to know the signal strength from the ones that are not experiencing this kind of problems (just to compare with mine and for being sure that is my radio with some weird issue).
So can anybody please tell me, in average, which is the signal strength experienced especially in closed spaces (e.g. at home, at office, etc.). I' have a range between -100db and -115db.
PS with your invoice I think that you can ship it directly to a samsung center for repair.

I just sent an email to Samsung support to see what they will do. My phone never goes above -90 and I've had drops in the city where I've never had problems before. My BB sitting right beside my GNex says -77 and the gnex says -95, iphone says like -84... I'm going to see about getting a replacement or something from Samsung.

I have the same Problem ...it´s definately the 4.0.4 ROM ... I sent my GNEX to the support 2 weeks ago and I got it back with an 4.0.1. ROM. But I did the update again . After that I had the signal problem again... and the hotline said to me please don´t update!
I don´t think that it is the Baseband or the Hardware... it must be the ROm or the Kernel.

I don't see anything strange.... You are experiencing exactly my same problems.... I haven't seen any sw solution to this yet... Probably I'm going to send my phone to repair.

[Rogers] Not allowed by SIM

My original thread has not been moved from the old forum, so I'm just going to link it here:
http://forum.xda-developers.com/showthread.php?t=1757711&highlight=not+allowed+by+sim
Anyway, someone on HoFo posted that if you change your APN to non-LTE, the problem goes away. I did that yesterday and so far I haven't seen the error. However, my coworker did the same thing on his S3 and still got the error. This issue is specific to Rogers network, as other people used their unlocked Rogers S3 on other carriers and did not see the error, but once they put in Rogers SIM back in, it was back. I wish Rogers would get off their ass and fix it!

This happens also on Telus. Not sure if I've done this APN trick, but I have HSPA locked and the modem locked on 850mHz through the service menu *#2263#, and I still get this error sometimes.
a quick flight mode toggle always fixes it.

dektoud said:
a quick flight mode toggle always fixes it.
Click to expand...
Click to collapse
Yeah, same here. It's just annoying when you're in a hurry and need to make an urgent phone call.

Not sure if this helps but I sell cell phones and a memo was released by rogers stating its a error in the firmware and that when rogers reception drops or its out of range it will say this, instead of showing no signal. Its states rogers and samsung are working on a fix for it. Its probably more noticeable on the rogers network than others because they are currently working on expanding there network in most of Canada therefore its probably causing signal drops every now and then.
Sent from my SGH-I747M using xda app-developers app

still having this issue after OTA update
TELUS

Sorry to resurrect an old thread but I purchased an unlocked S3 about 3 weeks ago and I just got this error today. I was not able to make any phone calls until I used the flight mode trick. I thought this problem had been fixed? I'm with fido so it's part of the Rogers family.
Does anyone else still experience this issue?

haven't had this error since the last time i posted which was September
although i find it more often that my phone would lose reception in places or situations where before i would have reception, but just SIM error.
so my guess is that the phone hasn't yet reconnected to the network after losing reception (from underground parking etc) and before it was "showing" reception when it had none and came back with SIM error. now it just flats out says what's going on, which is no reception.

Gnex GSM Out of Service

Im not sure if its what caused it but I dropped my GNEX yesterday. It wasnt from very high and ive dropped it before worse than that with no issues. I have have no network signal at all. I cant make calls or text and have no bars. In about phone it says Service State - Out of service. I put my sim in my old nexus one and it works fine. Ive flashed multiple roms, kernels Radios with same issue. Take battery out for a few min and powered back on. Still no service at all. Im guessing the radio is shot. Anyone have any suggestions? i Went ahead and ordered a nexus 4 but who knows when that will show up. its the GSM model on T-Mobile

donfrenchiano said:
Im not sure if its what caused it but I dropped my GNEX yesterday. It wasnt from very high and ive dropped it before worse than that with no issues. I have have no network signal at all. I cant make calls or text and have no bars. In about phone it says Service State - Out of service. I put my sim in my old nexus one and it works fine. Ive flashed multiple roms, kernels Radios with same issue. Take battery out for a few min and powered back on. Still no service at all. Im guessing the radio is shot. Anyone have any suggestions? i Went ahead and ordered a nexus 4 but who knows when that will show up. its the GSM model on T-Mobile
Click to expand...
Click to collapse
Please look at this thread: http://forum.xda-developers.com/showthread.php?p=37784623#post37784623
Also, have you tried using different SIM cards in your GNEX? I have the same problem as you, but I managed to get non T-Mobile sim cards to work.

chowabbajack said:
Please look at this thread: http://forum.xda-developers.com/showthread.php?p=37784623#post37784623
Also, have you tried using different SIM cards in your GNEX? I have the same problem as you, but I managed to get non T-Mobile sim cards to work.
Click to expand...
Click to collapse
Thanks for the reply. I don't have any sim cards that are active to try out in the phone.

Baseband issue

Hello. I have an unlocked i9195 on CM13 official. I currently live in the north of England, and I use the network called giffgaff (O2). I would like to know if any baseband would do or there are specific ones for these circumstances, like os version, location, network. I have bad signal most of the time. LTE does not work 98% of times, WCDMA around 50% and GSM works almost always. Any suggestions are welcome.
Thanks for your attention.

i am also on Giffgaff in the midlands. i9195LTE
running TWRP 3.0.3.0 , AOKP official rom 20170202 , remix N v0.6 kernel.
baseband I9195XXUCPI1.tar.MD5 [Vodaphone] latest for this phone ( i believe). from sammobile/firmware ( saw thread here XDA about updating Baseband)

justdlnow said:
Hello. I have an unlocked i9195 on CM13 official. I currently live in the north of England, and I use the network called giffgaff (O2). I would like to know if any baseband would do or there are specific ones for these circumstances, like os version, location, network. I have bad signal most of the time. LTE does not work 98% of times, WCDMA around 50% and GSM works almost always. Any suggestions are welcome.
Thanks for your attention.
Click to expand...
Click to collapse
I have the latest BTU version of the baseband installed it's from around 2015 been working fine here.
Its probably a coverage issue I recommended trying other carriers to find out which suits your needs best.
I myself am using unlimited data plan on Three, works wonders.
Sent from my GT-I9195 using XDA Labs

justdlnow said:
Hello. I have an unlocked i9195 on CM13 official. I currently live in the north of England, and I use the network called giffgaff (O2). I would like to know if any baseband would do or there are specific ones for these circumstances, like os version, location, network. I have bad signal most of the time. LTE does not work 98% of times, WCDMA around 50% and GSM works almost always. Any suggestions are welcome.
Thanks for your attention.
Click to expand...
Click to collapse
Any should work, though generally it's recommended you keep your ROM and baseband to a similar release date, especially if you are having issues. Are you still on the original baseband?
You should be getting good converge on O2 or are you in a remote hilly area or near some other source of interference?
Else it could be hardware eg damaged component or poor grounding of aerial or pcb to phone ground plane. (cleaning contacts and/or tightening screws may help)

IronRoo said:
Any should work, though generally it's recommended you keep your ROM and baseband to a similar release date, especially if you are having issues. Are you still on the original baseband?
You should be getting good converge on O2 or are you in a remote hilly area or near some other source of interference?
Else it could be hardware eg damaged component or poor grounding of aerial or pcb to phone ground plane. (cleaning contacts and/or tightening screws may help)
Click to expand...
Click to collapse
No I am not on the original baseband. I9195XXUCPE1 currently. Regarding the coverage, I checked on their website and the area its pretty well covered for 4G reception, nonetheless I believe there is probably something wrong with the phone itself, I will probably just give up on this phone and spare myself some days of calamity.
Anyways thanks for your reply.

justdlnow said:
No I am not on the original baseband. I9195XXUCPE1 currently. Regarding the coverage, I checked on their website and the area its pretty well covered for 4G reception, nonetheless I believe there is probably something wrong with the phone itself, I will probably just give up on this phone and spare myself some days of calamity.
Anyways thanks for your reply.
Click to expand...
Click to collapse
yes, sounds likely that it is hardware. A quick test you could do is pop the back cover off and connect a small wire to the test connector (at bottom level with the speaker) bypassing the actual antenna, if your signal strength improves then it is proof it is your antenna circuit where the problem is or the contacts.
You can also test by pressing down where the "touch" connectors are., see vid, sometimes it improves reception showing it's a bad connection with contacts.
This is often easily fixed by removing the inner cover & cleaning the contacts or applying a little more pressure to them with a little piece of plastic between them and the cover.
You can see from this video that the antenna are simply a "touch" connection to the main assembly.
about 2mins into the vid
should be a cheap fix at a repair shop if you don't fancy trying it yourself, if this is what it is.