[Q] Problems calling with multiple ROMs

Hi Guys,

I have a Samsung Galaxy S3 SGH-T999 (Tmobile). When I had the stock ROM the phone worked fine, but now I am having the same issue with multiple ROMs.

Whenever I make or receive a phone call, the screen turns black (LED off and everything) and it will not come back on until the other person has hung up (I can't, because I have no buttons). I have tried Cyanogenmod 10.2.1 stable, Cyanogen mod 11 nightly (newest), and Paranoid Android 4.4.2 BETA 3.

I read on another forum that this may have something to do with the proximity sensor, and I went to settings>devices>more and under "Sensors and Motors" there is only vibrator intensity. I also checked the call app settings and there are not any options relating to proximity sensor. I also tried several USSD codes to check that which I found online but have been unsuccessful in getting any of those to work.

Any help would be greatly appreciated!

Thanks,

EvilWoodchuck

Perseus71 said:

Try a CM 11 Stable (Don't go for latest nightly but the last stable) and recalibrate your Sensors. Make a CLEAN install no restoring apps or data. Also do you happen to have any Kernel tweaks of any sort ?

Last but not least, try a single light tap on Power button. That will bring the screen back.

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Got it working, had to manually recalibrate the proximity sensor with terminal emulator. Thanks for the help guys

Edit:

I am not able to post links yet, but here is the method used for recalibration if anyone needs it (credit to Viraj Kshatriya of androidlegend.com):

Prerequisites:
1. Enable USB Debugging
2. Root Access
3. Terminal Emulator

All commands will be done in terminal emulator as Root:

1. Enter superuser mode
su <enter>
2. Obtain offset value
cat /sys/devices/virtual/sensors/proximity_sensor/prox_cal <enter>
This will return a few numbers, the first one is your offset value
3. Obtain normal value
cat /sys/devices/virtual/sensors/proximity_sensor/state <enter>
This will return one number, this is your normal value
4. Modify /efs/prox_cal
Take your offset value, and add it with your normal value
Convert sum of these to hexadecimal
echo -en $ '\x**' > /efs/prox_cal (** being your hexadecimal number from above step) <enter>
chown system:system /efs/prox_cal <enter>
chmod 644 /efs/prox_cal <enter>
sync <enter>
reboot <enter>
5. Wait for phone to reboot and you should be good to go!!! :good:


EvilWoodchuck

See edit

Sent from my SGH-T999 using xda app-developers app