Unfortunately process.com.android.phone has stopped unexpectedly error whenever i disconnect a call Instead of call duration and other details, i get "Unfortunately process.com.android.phone has stopped unexpectedly error" whenever i disconnect a call. I am not able to check the prepaid balance of my phone. No USSD code works properly. This is happening in my new LetV 1s phone.

I have cleared the cache mentioned in the sites as a resolution. I even did a factory reset. Still it is not working. 
Kindly help me in this regard.

Thanks and Regards, 
Veena
Try clearing data of 


Phone (com.anddroid.server.telecom)
In-call Interface (com.android.incallui)
Dialer (com.android.dialer)


You could temporarily download TrueDialer or any other 3rd party Dialer.

If possible a provide a logcat.