[iMore Question]

whenever i hold my phone near my ear, it won't automatically off like it use to & sometimes it's accidentally press hold when my ear touch the screen.

[Rob Phillips]

Welcome to iMore! It's either a software glitch or an issue with the proximity sensor. Try resetting your device by holding the power button and home button down simultaneously until you see the Apple boot logo. If the problem persists contact Apple Support or take your phone into an Apple Store.
You may also want to try erasing your device and restoring.