Wifi button greyed out after Touch IC repair
So we had a customer who's IPhone 5s had (inexplicably) stopped touch.
First thought was a faulty LCD but when changed, still would not touch. So we sent away to technician to look at the IC which he fixed and touch came back. We gave the phone back to customer and 2 days later he calls and says that he can't turn on wifi.
He claims that wifi was working prior to repair (even though the touch wasn't working so couldn't have checked anything) he said that his Apple Watch was connected to the iPhone hence why he knows the wifi was working. He said he tried resetting network settings and restoring it through iTunes to no avail.
I took it back to my technician who denies he's at fault. But He has looked at it, made sure antenna is connected, changed the wifi flex cable, even changed the Wifi IC but no luck.
He says the only other possibility is the U2 IC chip but this could wipe the phone data.
Does anyone have an opinion on this please?
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**UPDATE**
The phone is really playing up. I put my sim inside to update the date and time as innoticed it was day and half behind. Now there's heat coming out of the main A7 chip area. The camera is behaving erratically, the phone antenna signal jumps around.
I'm calling this phone a write-off
Whatever's caused the touch IC to malfunction, I think is causing all these other problems including dead wifi...
- de Amir A