I installed a tempered glass screen protector as soon as i got my iPhone 5c. http://www.amazon.com/i-Blason-Temp...=1383030382&sr=8-2&keywords=i-blason+tempered I have had issues with proximity sensor. I feel the autobrightness is also not that sensitive. I am not sure if its due to the screen protector or an issue with the phone itself. I googled and found 50/50 answers to the question. Anyone has issues with proximity sensor not working along with tempered glass protectors?