Develop Bugs

How to fix Call Dropping ???

I've had this phone about a month, and I can't have a phone call longer than 15 minutes without the call dropping. It has nothing to do with my location, because I have an Evo and older Epic in the same house and neither of them have a signal problem.
I have tried multiple PRLs and modems, including EL29, EK02, and many of the newer ones like FD19, FD24, FD26, FE07, etc.
Some of the newer modems were terrible, in that once I got loss of signal it would stay that way and I'd have to reboot. With EL29 and EK02, the loss of signal appears for only a few seconds, but when that occurs during a call the call drops.

seems like a weird issue, and looks like you have explored software related issues. One thing you could try is a network reset and force the phone to re-activate on the network, you will need your MSL though. If your device is rooted then you can get it. once you have your msl, go to the dial pad and do ## 72786#, it will ask you for your msl and should reset, this just clears out your programming information and should force the device to go through hands free activation. Not sure if it will help, but I don't think it could hurt.

Tried that also, same problem.

You stated that you've changed prls and modems. Have you tried any different roms?
Sent from my SPH-D710 using XDA

I'm currently using Blazer 4.1 ROM.
One thing I've noticed, is if I turn off 3G data, then the Loss of Signal occurs a lot less often. Today I had a 40 minute call that didn't drop once I turned off 3G. Before I turned it off, I had 5 consecutive calls drop before they reached 20 minutes.
However, it's not a total fix, because I still get Loss of Signal from time to time with 3G off.

ever find a solution to this? this seemed to only appear when i went from a GB to a ICS rom.. but even after i flashed back to my GB rom/older modem, the problem is still there..

Ive had issues network related on mine. Certain roms well kernals mess with things that need left alone. Are you running one of the LOS kernals? I had constant issues with them. Try doing a full format then flash to stock unrooted eg30 then use ota up to ics. Then flash on. Ive fixed many issues with this method. IT seems when we flash flash flash it messes with it. But flashing back to true stock formated does seem to help

miketucky350 said:
Ive had issues network related on mine. Certain roms well kernals mess with things that need left alone. Are you running one of the LOS kernals? I had constant issues with them. Try doing a full format then flash to stock unrooted eg30 then use ota up to ics. Then flash on. Ive fixed many issues with this method. IT seems when we flash flash flash it messes with it. But flashing back to true stock formated does seem to help
Click to expand...
Click to collapse
i'll try that, i do remember trying to flash back to stock ICS while trying to fix things and that did not help. i would have figured just restoring my old GB rom would fix things but seems the network issues were stuck.
Thanks

Little or no signal.

I had flashed to an AOKP rom a while back and had since had a very significant and noticeable drop in signal strength. So much so that I was unable to get a signal at all in places when I would normally have 2-3 bars. Other people still get signal in those places with the same service provider. I decided to try to flash different modems to try and fix the problem. I have since tried 3 different JB modems from rogerwilco's modem repository for the E4GT. Every single one I have not been able to get a data connection at all. At most I have been able to get 1-2 bars and no data connection. Even if my signal strength was low I could care less as long as I could get a data connection at all... can someone please assist me? Has anyone else been running across any other type of issue? I also wanted to know... when I update profile and PRL... is this stored in /data or does it burn it to the same area of memory as the modem image? Primarily... does it get wiped when you wipe data?

Goblinlord said:
I had flashed to an AOKP rom a while back and had since had a very significant and noticeable drop in signal strength. So much so that I was unable to get a signal at all in places when I would normally have 2-3 bars. Other people still get signal in those places with the same service provider. I decided to try to flash different modems to try and fix the problem. I have since tried 3 different JB modems from rogerwilco's modem repository for the E4GT. Every single one I have not been able to get a data connection at all. At most I have been able to get 1-2 bars and no data connection. Even if my signal strength was low I could care less as long as I could get a data connection at all... can someone please assist me? Has anyone else been running across any other type of issue? I also wanted to know... when I update profile and PRL... is this stored in /data or does it burn it to the same area of memory as the modem image? Primarily... does it get wiped when you wipe data?
Click to expand...
Click to collapse
JB modems don't work on the aokp roms..... I think... Not sure.
Sent from my SPH-D710 using xda app-developers app

E4GTUser94 said:
JB modems don't work on the aokp roms..... I think... Not sure.
Sent from my SPH-D710 using xda app-developers app
Click to expand...
Click to collapse
Interesting... I have to say... it is rather difficult considering I can't find much as far as compatibility information for modem images... not with between versions anyways. Meaning... what is compatible and works with what. All I can seem to find out is what stock image they came out of.

JB modems only work with JB touchwiz based roms. All other modems work fine with all other roms. The FI27 modem worked just fine for me on various aosp roms.

The FL24 modem works great for me on AOSP. The leaked JB modems do not work on AOSP. I didn't have great luck with them on stock rooted roms either though (FK23 and FL04).

I would try a stock rooted build like FK23 and run it for a while and see if you get your signal strength back.
Them you can figure out whether it's your radio or Rom.
Pp.
sent from a jellybean filled epic touch.

PanchoPlanet said:
I would try a stock rooted build like FK23 and run it for a while and see if you get your signal strength back.
Them you can figure out whether it's your radio or Rom.
Pp.
sent from a jellybean filled epic touch.
Click to expand...
Click to collapse
Actually, flashed to an ICS radio and it started working.

[Q] Sprint GS3 Signal Reception

So this is my first flash to a different ROM on my GS3. I have been rooted for a while and decided I wanted to try a different rom on 4.2.2 coming from 4.1.2 with touchwiz. I am using the Dirty Unicorns 4.2.2 ROM and I noticed my signal reception is spotty at best. I am talking data and voice together. I flashed back to my 4.1.2 touchwiz stock rom and the reception went back to normal. I did some research on this issue and started looking into APNs. I noticed the file on the Dirty Unicorns rom is full of VZW, CREDO, Sprint... but the stock Sprint ROM only has Sprint stuff. The differences in the 2 files, only looking at the Sprint settings is slightly different still.
Is this my issue? If so should I use the stock APN file?
I am using the stock MD4 baseband and my PRL is 25015. Any thoughts or troubleshooting steps are appreciated.

I did some deeper research to find that the signal reception seems to be reporting incorrectly in the Dirty Unicorns ROM. I downloaded an app from the play store called network info II. This reported my cell reception to be the same it was on the stock MD4 touchwiz rom. I also think that the signal bar is reporting the faulty reception listed in the about section of settings. I made a few phone calls and ran Pandora on the cell network with no abnormal loss of quality.

Try a app in play store
Signal Check Lite
Gives a lot of info and signal strength for data too

I like that app better than the other one I was using... Thanks for the tip!
GSXeclipsePSI said:
Try a app in play store
Signal Check Lite
Gives a lot of info and signal strength for data too
Click to expand...
Click to collapse
Back to my issue, it looks as if the phone is reporting correct numbers in the signal information fields. What it looks like it is showing is the data connection it is using. I also, sometimes, find my phone on LTE even when I connected to wireless seems interesting. I am not sure however about the signal bars at the top of the phone. Rarely ever do I see them rise above 2 bars. Maybe somebody from an AOSP rom or CM rom could chime in with an answer.. even a DEV!!
FYI: Would have posted this in the development forum but I didn't have enough posts at the time. I am also sharing my info just in case it isn't around or it helps someone else.

[SOLVED] Same problems over here
edit 10/10/13 [SOLVED]: I found this thread about Team Sonic Modem Flasher Tool. There are five available radios in the super easy package. 1-4 came up with error messages, "No SIM card," or no signal with an Unknown Baseband in the phone settings. The fifth one, "LI3" radio solved my problems.
The Flasher Tool doesn't have a means of backing up your current radio. Seems like as soon as you start installing these other radios, your original one (mine was an MB1) was gone. BTW, my phone Baseband was a long string of letters and numbers. The type of radio that you've got is the last three characters.
I was also experiencing problems with other ROMs than the stock rom on my Sprint Galaxy S3. I was running Cyanogenmod 10 release candidate, and it seems to me that the signal was way worse than with the stock rom. I would also be in downtown Seattle, certainly with LTE service, and still I was stuck at 3G. 4G/LTE seems to be a thing of the past with the newer ROMs that I've been enjoying.
At the moment I'm back to a stock ROM, CleanBean v4.2 with Android 4.1.2. It seems to be happier. But I won't be back to an area with normal cell service for quite some time.
An interesting idea that the ROMs were reporting the incorrect signal strength. But reporting 3G vs 4G incorrectly too? That seems like something else was wrong.
I was thinking perhaps it was the radio or something, but CM doesn't really mention anything about flashing specific radios.

Are you judging from actual numbers or the signal bar? The latter is notoriously inaccurate many times (and can vary depending on what rom you're using

As for not jumping on 4g when I should have been, that was my oops. I had the settings in the phone to only do CDMA/3G rather than LTE/CDMA/3G. I would flash the radio to the newest version and leave it at that. I heard from someone else in another thread that the radios don't get changed.
dkerlee said:
I was also experiencing problems with other ROMs than the stock rom on my Sprint Galaxy S3. I was running Cyanogenmod 10 release candidate, and it seems to me that the signal was way worse than with the stock rom. I would also be in downtown Seattle, certainly with LTE service, and still I was stuck at 3G. 4G/LTE seems to be a thing of the past with the newer ROMs that I've been enjoying.
At the moment I'm back to a stock ROM, CleanBean v4.2 with Android 4.1.2. It seems to be happier. But I won't be back to an area with normal cell service for quite some time.
An interesting idea that the ROMs were reporting the incorrect signal strength. But reporting 3G vs 4G incorrectly too? That seems like something else was wrong.
I was thinking perhaps it was the radio or something, but CM doesn't really mention anything about flashing specific radios.
Click to expand...
Click to collapse
As for the feeling that the signal was reported incorrectly, I learned this. Dirty Unicorns, probably most other modded ROMs as well, are reporting the TRUE data signal strength in the signal bars. I downloaded Signal Check Lite. I compared the signal reported in the ROM to what this program says and they are identical. The bars are reporting the connected network types signal strength (ie. LTE,3G). It also says to be showing the RSSP which has been widely skeptical in most threads. If you're worried about your signal, check that program before switching away from a ROM or going back to stock. I actually kind of like them displaying the good info rather than just voice signal.

Does the kernel being used have any affect on signal reception? I'm just curious because I've switched between a few different 4.3 ROMs and the quality of signal is different between them.
When I was running Slim Bean 4.3, receiving a data signal at work wasnt a big issue. This morning I flashed Liquid Smooth 4.3 and even though the numbers being reported for signal strength are very similar, data on Liquid Smooth is almost unusable. Let me reiterate; Same phone (latest PRL), same location, same radio (MD4), same signal data numbers, using 2 different 4.3 ROMs and getting 2 extremely different usability results.
I'm not blaming either ROM, so I dont want to post in said threads, but is there a reason why this would be happening?

You are using data on the cell network and not the wifi network correct? There is a slight chance that it could but it would be mostly dependent on your modems I think. I am sure the modems and the kernel interact but that is about it. Testing for my issues, I am flashing the stock kernel back in, after doing a nandroid of course.
Disclaimer: I could be speaking rubbish. If I am please feel free to correct me, as I am still trying to learn.
uodii said:
Does the kernel being used have any affect on signal reception? I'm just curious because I've switched between a few different 4.3 ROMs and the quality of signal is different between them.
When I was running Slim Bean 4.3, receiving a data signal at work wasnt a big issue. This morning I flashed Liquid Smooth 4.3 and even though the numbers being reported for signal strength are very similar, data on Liquid Smooth is almost unusable. Let me reiterate; Same phone (latest PRL), same location, same radio (MD4), same signal data numbers, using 2 different 4.3 ROMs and getting 2 extremely different usability results.
I'm not blaming either ROM, so I dont want to post in said threads, but is there a reason why this would be happening?
Click to expand...
Click to collapse

Custom ROM and stock kernel don't seem to work, at least with me. Recovering from nandroid right now.

Skeeredfitless said:
Custom ROM and stock kernel don't seem to work, at least with me. Recovering from nandroid right now.
Click to expand...
Click to collapse
On custom ROMs you run, I think its best to run the kernel that the developer incorporated into the ROM for awhile. Then if you are sure your picking the correct kernel, you can try it out, but not before a nandroid of course. A touchwiz kernel is not going to function correctly on a AOSP ROM. Can cause alot of problems, TW & AOSP kernels are 2 totally different animals.

My battery life is sucking. I am trying to improve it so I thought I might try the stock one.
joeyhdownsouth said:
On custom ROMs you run, I think its best to run the kernel that the developer incorporated into the ROM for awhile. A touchwiz kernel is not going to function correctly on a AOSP ROM. Can cause alot of problems, TW & AOSP kernels are 2 totally different animals.
Click to expand...
Click to collapse

Skeeredfitless said:
My battery life is sucking. I am trying to improve it so I thought I might try the stock one.
Click to expand...
Click to collapse
Too many factors to list can cause this, try a different ROM with a clean wipe. Never use a TW kernel on a AOSP ROM.

[Q] ROM's, PRL updates and all that fun stuff

Hello all. I'm Trying to figure out what I'm doing wrong here. I lost my IMEI and all, did the stock ROM to get it all back (which was a 4.3), rooted it and then got rid of KNOX. I have flashed to various custom ROM's since then and continue to have the same problems, which are bad GPS locks (or no GPS locks and its using cell tower and wifi for a position) and loss of mobile data (no 4G or 3G, think it happens when I'm on 3G for extended amount of time or something). I've tried AOKP, Cyanogen, and other various AOSP ROM's, different modem's, and different kernels. From what I understand you can't do PRL updates on AOSP after 4.2, and to accomplish this you have to flash back to stock, do the PRL update, then restore your previous custom ROM from a backup. Anyone have any idea where a good tutorial or where some info I could use. Also I would like to get a better understanding of some other things, like why flashing the ROM does not change the modem, kernal, prl ect. for starters (writes to certain portions of the file structure, while leaving others alone?) I need to start understanding Linux and stop trying to relate it to a Microsoft O/S. Any help would be appreciated (even a really big flow chart). Thanks.

fhaq said:
Hello all. I'm Trying to figure out what I'm doing wrong here. I lost my IMEI and all, did the stock ROM to get it all back (which was a 4.3), rooted it and then got rid of KNOX. I have flashed to various custom ROM's since then and continue to have the same problems, which are bad GPS locks (or no GPS locks and its using cell tower and wifi for a position) and loss of mobile data (no 4G or 3G, think it happens when I'm on 3G for extended amount of time or something). I've tried AOKP, Cyanogen, and other various AOSP ROM's, different modem's, and different kernels. From what I understand you can't do PRL updates on AOSP after 4.2, and to accomplish this you have to flash back to stock, do the PRL update, then restore your previous custom ROM from a backup. Anyone have any idea where a good tutorial or where some info I could use. Also I would like to get a better understanding of some other things, like why flashing the ROM does not change the modem, kernal, prl ect. for starters (writes to certain portions of the file structure, while leaving others alone?) I need to start understanding Linux and stop trying to relate it to a Microsoft O/S. Any help would be appreciated (even a really big flow chart). Thanks.
Click to expand...
Click to collapse
Personally I stopped using ASOP and AOPK roms, because you lose a lot of the key functions of what the phone was designed for mainly SPEN features... If you flash a TW rom and it has the sprint app, you can update prl and profile that way.. I personally us goodness 3.03 MC2 the last one that was made.. It comes with the prl write function, so you change your prl any time you want..

I'm starting to look into the MIUI ROM's out there. I want to keep some of the Samsung functionality (like screen mirroring), but I guess I want my cake and eat it too.

doubledragon5 said:
Personally I stopped using ASOP and AOPK roms, because you lose a lot of the key functions of what the phone was designed for mainly SPEN features... If you flash a TW rom and it has the sprint app, you can update prl and profile that way.. I personally us goodness 3.03 MC2 the last one that was made.. It comes with the prl write function, so you change your prl any time you want..
Click to expand...
Click to collapse
No you don't.
Not if you search Google for superior alternative apps for 30 seconds.

Skripka said:
No you don't.
Not if you search Google for superior alternative apps for 30 seconds.
Click to expand...
Click to collapse
First I have heard of this.. Plus many users have stated the same thing.. So what is the reason behind the lousy sound with these roms, plus the unstable connection issue.. Two more reasons why I switched back to TW..Now the roms themselves look real nice, but somethings still need to be worked out before I would even consider trying them again..

doubledragon5 said:
First I have heard of this.. Plus many users have stated the same thing.. So what is the reason behind the lousy sound with these roms, plus the unstable connection issue.. Two more reasons why I switched back to TW..Now the roms themselves look real nice, but somethings still need to be worked out before I would even consider trying them again..
Click to expand...
Click to collapse
People repeat the same wrong thing often enough, they start to believe it. About the only thing you can't do is the useless air command crap as of now.
Don't know about "unstable connection issues", just about any ROM data either works or it doesn't. Sound issues are often kernel related. Latest Plasma does wonders.

[HELP NEEDED] Blocked calls on AOSP?

First off, before getting into anything, let me just say that yes, I do fully realize that I am posting this in the wrong section. The reason why I'm posting this thread here is to fully ensure that this issue gets the most attention as possible, as I've already posted for help if the Q&A section of the G2 forums and various other help threads, to no avail. This is kind of my last resort here.
Whenever I'm on an AOSP ROM, using either basebands ZV8 (From my understanding, some LS980 ROMs only work with JB/ZV8 modem) or ZVD (The modem zip is named KK_BASEBAND.zip by Cloudy, so I'm ASSUMING that's either ZVD or ZVC), data, outbound calls, texts, everything works, EXCEPT for incoming calls. Just goes straight to voicemail. And this is only with AOSP ROMs. Stock ROMs perform with no problem. I've been trying to get to the bottom of this issue, but I just can't seem to get a finger on it. So I'm currently in stock until I can get some insight on this. Has anybody had any experience with this, or know what's going on? Any and all help would be greatly appreciated. And, for what its worth, I rooted using towelroot+AutoRec.

zv8 baseband works for me on incoming calls, (texting wise i have to use a 3rd party app) *currently running cm 12 at the moment*

jcwxguy said:
zv8 baseband works for me on incoming calls, (texting wise i have to use a 3rd party app) *currently running cm 12 at the moment*
Click to expand...
Click to collapse
ZV8 works for me for a little while, too, and then it seems like a day later or so, all incoming calls go straight to voicemail. I usually call myself at least once or twice a day just to make sure everything still works, and calls get blocked sooner or later. Is there a dialer code I could use to upgrade PRL on AOSP? Going back to stock > upgrading PRL seems to do nothing, so I'm wondering if it'd be better to do it on AOSP, rather than going back to stock.

no way to update profile or prl on aosp unfortunately

iamterence said:
ZV8 works for me for a little while, too, and then it seems like a day later or so, all incoming calls go straight to voicemail. I usually call myself at least once or twice a day just to make sure everything still works, and calls get blocked sooner or later. Is there a dialer code I could use to upgrade PRL on AOSP? Going back to stock > upgrading PRL seems to do nothing, so I'm wondering if it'd be better to do it on AOSP, rather than going back to stock.
Click to expand...
Click to collapse
I was having this issue on stock and aosp turns out sprint was working on towers here upgrading them... And it only affected incoming calls... Might want to call sprint and see...had something to do with spark bands in our phone...next time you try aosp put it on CDMA and see what happens... That was my experience

goast said:
I was having this issue on stock and aosp turns out sprint was working on towers here upgrading them... And it only affected incoming calls... Might want to call sprint and see...had something to do with spark bands in our phone...next time you try aosp put it on CDMA and see what happens... That was my experience
Click to expand...
Click to collapse
I may, or may not have finally found a solution for this. I was on Super G2 ROM with ZVC modem, PRL/Profile updated and everything, and instead of downgrading modem to flash certain AOSP ROMs, I flashed last Mahdi build (which is on KK modem) and just left the radio alone. So far, everything seems to be okay. So far. I've been getting calls and calling myself randomly from Google Dialer to make sure everything is good, and all remains well for the moment. We'll see how this turns out.

Im having this same problem, on Sprint using a G3 on AOSP rom.. its kind of annoying, especially since all my calls go straight to vmail.. is there a fix?

You can also try the ZV7 modem