No Audio on Phone Calls and unable to go back to stock firmware

[estranho]

Hi Everyone,

I've been working on this issue for 3 days now and this morning I made things even worse and I'm hoping someone can help me out.

I have an AT&T Samsung Galaxy S2 (SGH-I777) (The splash screen says GT-I9100 on the only firmware I can get to load)

I am currently running the CyanogenMod 9 Resurrection Edition (cm-9-20120420-ODIN-galaxys2.tar) but I have no audio on any phone calls. I can place outbound calls and they connect, but neither end hears anything.

I tried fixing this today by going back to stock firmware using Odin, but I accidentally put the *.tar file in the Bootloader location and hit start. It completed like it worked, the phone rebooted and it displayed the AT&T splash screen, but then just stayed on that screen and never booted.

I was able to go back to the CyanogenMod 9 Resurrection Edition, and I even tried MIUI and both boot up, but the phone doesn't work in either of them.

I'm hoping someone has an idea because I'm running out of things to try.

[Ads]

[Ollie]

Did you try the stock firmware in Odin in the PDA slot?

Sent from my GT-I9300 using Tapatalk 2

[Ollie]

This is ICS:

http://www.hotfile.com/dl/160521955/...5_ATT.zip.html

Unzip it once using 7Zip or WinRar. Flash it in the PDA slot of Odin.

Sent from my GT-I9300 using Tapatalk 2

[estranho]

Thanks Ollie,

I did put the stock firmware into the PDA slot in Odin and it had the same results: The AT&T splash screen is displayed but it never gets any further. I've tried a few different AT&T firmwares (ICS and Gingerbread) all with the same results. I am downloading the file you posted now and will give it a shot.

[estranho]

Ok, it appears that things are now working for me.

I found a thread at xda-developers where someone had a similar issue and it was suggested that he could install a new 'modem' and it should work. And there are TONS of modem versions out there so I wasn't sure which to try, but I tried a few and none seemed to work. Here's the thread for the modems.

My next step was to try the modems with the MUIU firmware since it was the only other firmware I could get to work. While installing the MUIU firmware I did something a bit different from the other times I'd installed the firmware, I deleted the user data and cleared the cache partition and dalvik cache before installing the MUIU firmware.

I booted up MUIU and tested the phone and it worked!

Unfortunately I didn't want MUIU, I want Cyanogenmod 9... so, I tried installing Cyanogenmod 9 again, wiping the data and caches before doing the install and everything now seems to be working!

This is quite a relief for me... and a lesson to anyone thinking about installing a custom ROM on their phone, if it's your work phone don't do it unless you have a backup phone you can use for a few days, just in case something doesn't go right.

[Ollie]

The best thing to do right now is make your current phone your backup phone.

Make a Nandroid backup through CWM in recovery. Keep a copy of it on your phone and put a copy on your PC. Do not rename any files or folders of the backup or it may corrupt it.

This way you always have a 'last good' backup to fall back on.

The way my backup system works is that I flash root onto a stock firmware. Then I make a Nandroid right away. It is a clean system image that isn't complicated by installs and uninstalls of apps, mods, tweaks.

Then I flash a rom that I am interested in. If it works well I will make another backup.

After setting it all up and running it for a while to ensure that all is good, I make a final backup.

This way I can fall back to stock rooted, stock custom rom, or final custom rom.

Sent from my GT-I9300 using Tapatalk 2

[blazar]

I stomped upon exactly the same issue. At first, I thought I used the wrong firmware (for I777 not for I9100)
My model is actually I9100, but then even after I reverted to the old backup, the phone call still does not work, it can connect but I can't hear anything.

I following the following steps: http://www.androidauthority.com/gala...ecovery-76868/ to root my phone.

Could you provide links for each step you finally fixed the phone?

Thanks!

Ok, it appears that things are now working for me.

I found a thread at xda-developers where someone had a similar issue and it was suggested that he could install a new 'modem' and it should work. And there are TONS of modem versions out there so I wasn't sure which to try, but I tried a few and none seemed to work. Here's the thread for the modems.

My next step was to try the modems with the MUIU firmware since it was the only other firmware I could get to work. While installing the MUIU firmware I did something a bit different from the other times I'd installed the firmware, I deleted the user data and cleared the cache partition and dalvik cache before installing the MUIU firmware.

I booted up MUIU and tested the phone and it worked!

Unfortunately I didn't want MUIU, I want Cyanogenmod 9... so, I tried installing Cyanogenmod 9 again, wiping the data and caches before doing the install and everything now seems to be working!

This is quite a relief for me... and a lesson to anyone thinking about installing a custom ROM on their phone, if it's your work phone don't do it unless you have a backup phone you can use for a few days, just in case something doesn't go right.

[blazar]

Found the simplest solution after much frustrations and searches: USING KIES!

1. install kies on the computer.
2. make sure the phone is disconnected, start kies, go to tools -> firmware upgrade and initialization, it'll prompt you for phone model and s/n number.
3. Follow the instruction, turn phone off, pull out the battery and copy the model and s/n # into kies.
4. click ok, kies will download files needed from the web site, it takes quite a long time, I almost felt it hung.
5. Then a new window pops up tell you what to do to boot up phone in download mode.
6. Follow the instruction, either hold both volume buttons and power or hold volume down + power + home button, it will boot up to download mode, press volume up to OK.
7. Now, connect the phone to computer;
8. Follow the on-screen instructions to complete the operation.

Ta ta! the phone is back to the latest stock firmware state and the phone call problem went away.

[jmeador88]

Im trying this on my phone, but there is no Serial Number , I am able to get the model the only other numers are for IMEI: the SKU: the FCC ID: and i have tried all of those. The only S/N is on the back of the battery itself.

[bclaff]

try an app named SoundAbout. worked for me.