[Android Q&A, Help & Troubleshooting] sfynx1:
Have you tried flashing stock rom and do a factory reset? usually that fixes softkeys, if still no go, use this code still in stock rom *#*#2663#*#*

if it displays phone's Touch is 0x9 and Part's Touch is 0x0. If this is so, now press Touch Key FW Update which will upgrade your Part's to 0x9, after that reboot and try, if still no go try another factory reset, if that still does not fix it theres a last resort, but more tricky, i'll paste the solution, credits to original poster.

Originally Posted by Qasha

To all my fellow GT-I9210T buddies who have a wonderful phone in their hands but are missing 2 much needed soft buttons.... your painful wait is FINALLY over!!!

Finally a fix for our dreaded soft button issue - guaranteed to work (on my phone anyways)

I've managed to un-brick my GT-I9210T that lost its soft buttons (literally on the first day the phone came out!) during the 'infamous' CWM v5.0.2.6 root'>http://www.androidpt.info/index.php?title=Root']root.

Let me show you how!!!

WARNING: do this at your own risk!

Assuming you've got CWM v5.0.2.6 on your I9210T and a most recent backup zip on your SD (doesn't have to be pre-superuser i.e. your first ever back-up)

1. Copy your back-up file from SD to your computer (just in case)

2. Install ICS Megamix 1.31 EXACTLY THE WAY IT TELLS YOU TO (MAKE SURE YOU INSTALL DARKSIDE SUPERWIPE)

Install ICS Megamix 1.31 - http://forum.xda-dev.....php?t=1576924

DARKSIDE SUPERWIPE - http://forum.xda-dev.....php?t=1477955

As you reboot, you will notice it (ICS) being unstable and unable to make calls.

3. Now press *#*#2663#*#* and confirm Phone's Touch is 0x9 and Part's Touch is 0x0. If this is so, now press Touch Key FW Update which will upgrade your Part's to 0x9

4. Reboot

5. Now laugh as you see your phone having a psychotic episode. Your soft buttons should be lit up and your screen should be wacky (like you're repeatedly and continuously pressing the soft menu button). NOTE: although your buttons are lit up now (brought tears to my eyes), they are not working yet but are close to working

6. Now, reboot into CWM v5.0.2.6

7. YOU MUST FOLLOW THIS TO A TEE (INCLUDING DARKSIDE ERASER):

* Wipe Data

* Wipe Data

* Wipe Cache

* Flash DARKSIDE SUPERWIPE

* Wipe Data

* Wipe Cache

* Flash Recent back-up (or whichever back-up you have chosen)

8. Log into your restored phone

9. If all worked well, your Part's FW should be 0x9 and your screen should be all funny like with the ICS (menu soft button repeatedly being pressed out of your control)

NOW THE TRICKY PART (took the longest to do)

10. Press the Pone button (as though you're trying to make a call), immediately press somewhere your screen, away from the number buttons and close to the black digit area, in order to stop the phone from entering that psychotic loop. As you are holding down on the screen with one finger, press *#*#2663#*#* and, if done right, you should enter into the Part's FW update screen, IF YOU'VE DONE IT RIGHT. Confirm your Touch is 0x7 and Part's Touch is 0x9 and then press the Touch Key FW Update which will downgrade your Part's to 0x7

11. Reboot (no need to remove battery)

12. Press *#*#2663#*#* and your Touch should be 0x7 and Part's Touch 0x7

13. Now smile and shed a tear or two and think of me

NOTE: I then rebooted into CWM v5.0.2.6 and did nothing but exit by rebooting. When my phone rebooted, my Part's Touch returned back to 0x0! All I had to do was press the Touch Key FW Update button and when done, rebooted. BUT when I power off the phone via CWM v5.0.2.6 and then turned it on normally, the buttons were there and working perfectly.

Regards,

Qasha

If by any chance after all this it still wont work then it's hardware problem, and u need to take it to repair.