Problem using finger print
Hi.
My phone is iphone 6 ios 11.3.1.
Last night , i use my fingerprint sensor good.
As morning, when power on my iphone, see "unable to activate touch id" and "add finger print" is GRAY color.
I try to restore my phone, but it'snot work.
I change my lcd last 2 week and finger print work exactly.
What is solution for thisproblem?