Originally Posted by tejasjani55
I have updated canvasHD to 4.2.1 official,due to TPupgrade my touch is not working,any solution?
Kindly post what type of upgrading you've done.
and state all the process that you did.
basic troubleshooting requires documentation.
If you flashed the upgrade through CWM, try to do a full wipe and reflash it again.
After flashing is complete, reboot and don't you dare touching the screen (just don't touch the phone) during TP upgrade.
usually that is the cause of the problem.