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hello i have iphone 6 plus its touch is not working some time its works for 5 sec but mostly not working i faced this problem since last 3 days please tell me whats the reason? and its solution Thanks Abbas

They have a problem with the touch ic and it needs reflowed or replaced. You will need to take it to someone who can do microsoldering repair.

Just do a screen replacement since the screen could be bad and that show fix it.