A customer brought their iPhone 4 in today with a proximity sensor fault. They had their screen repaired by another local repair company, all looked fine until they noticed the screen didn’t turn off during a call. This became very annoying over the following weeks where numerous times they had either ended the call or put the caller on hold by pressing buttons with their cheek.
ABOVE: iPhone 4 midframe showing front camera, Ambient Light Sensor and Proximitry Sensor.
The solution to the problem was to strip the phone, remove the new screen and fit a UV light filter and foam pad over the proximity sensor. While the phone was apart a new earpiece mesh, camera right and LCD/Touch screen FPC foam spacer pads were fitted. We always fit these parts when we fit a new screen because if Apple thought they were needed then so do we.
The customer was charged just £30 and had a phone that worked as it should.