Urgent Plz Need Help My LG G2 touch not working after Lollipop Upgrade

Hi frdz i just updated my kitkat LG G2 d802 via flash tool 2014 to Lollipop version d80230c ... But after Update my touch not working correctly randow multiple touches while i just touch at one time ... plz help me i am new to android world

before updating i put my IMEI on
http :// devtester .ro
and then they give the update d80230c about 1.6 gb
now i m in serious problem plz help me Urgent plz

i dont have box and its not showing IMEI number .. The only thing i know about my phone is, it is d802 32gb
now i dont know my phone IMEI

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Urgent Plz Need Help My LG G2 touch not working after Lollipop Upgrade