Chosen Solution

Hi friends. I have a big problem. iPhone not working proximity sensor … the problem is not the sensor I tried to mount other 3 display (disassembled by original phones) but it doesn’t work … This phone had already been removed by someone. What could be???

After you installed the new prox sensors did you soft reset the device and then test? If you did that with all three with no luck then it may be the connector on the motherboard which would not be worth replacing. Good luck!