OK read on !
First off lets make things clear here ....these below ARE NOT THE REASON OF MALFUNCTIONING NOR SOLUTION
1 - don't open up and replace your lcd digitiser .. it's not hardware issue..trust me i've been there !
2 - some say it's becuz of cheap lcd protector (?)...NO
3 - using the registry editing technique and changing the PRIORITYWHATEVER! registry node from 100 to 220
this was pure nonsense...doesn't work ...don't waste your time (though some report of success .. i don't know)
4 - factory reset ... NO .. don't lose your contacts for nothing
5 - reflashing Another Custom rom ..NO !
6 - Ok just the ones above
Now what to do then
two options and i suggest the second one..
1 - install the Deuch t-mobile official rom that updates your phone's touch driver from v63 to v69. so that worked actually ...at least for a period of joyful time ! but after 5-6 months again..The phone went zombie on me...so obviously those deutch people's ROM isn't good for a long-term relationship...
(if you wanna go that route ... Check out This Thread )
2 - some carzy idea came up on me to install this rom that ONLY installs the 63 touch driver AGAIN on my device..i was shocked to see that you can actually downgrade the touch driver that easily (from v69 down to v63) ... and it worked like a charm...
Here's The steps to install it
1 - Download The Attachment below (touch driver)
2 - Download Windows Mobile Device Center From Google And install it on your PC
3 - Download Advance mozart RUU File From
Here
4 - Put This RUU.exe inside a folder beside the Touch Driver File You Downloaded earlier
5 - Rename The touch driver file to mozaimg.nbh
6 - take a backup of all the file on the phone that is important to you because all the data gets wiped out after installing the touch driver...
7 - turn off the device .. then hold the volume down button and turn it on .. you should see a weird RGB screen with some text on it ... Lookup the version of the touch driver (if you want !) ... Now down below it says SERIAL
if you connect it with the usb cable to pc and you've already installed windows mobile device center it should change to USB...
8- NOW you're ready to install the touch driver ... click on mozartRUU.exe file and click next all the way..wait for it to finish