SE G700 Touch and Upgrade

[joabel]

Hi

I just bought this SE G700 from Ebay, seller said was everything ok, but as its common, they sell the stuff doesnt work anymore for them, HATE THAT.

Thing is that the phone works and everything but a part of the touchscreen is not working, a zone as a matter of fact, I attached a photo, phone doesnt have water damage.

Anybody know if its digitizer problem or any idea???

Besides Im interested in upgrading it via SEUS, just to see what happens, but Im not really sure, phone is UNLOCKED, 5 locks are UNLOCKED. If I upgrade the software of the phone will it get locked?????? Phone is from China, language and that. Bought in China.

Thanks