jessiev

How do I lock my iPhone 4 screen when on a call?

Anyone know where the setting is to make sure my iPhone 4's screen locks during a call? Hopefully the sensor isn't busted!!!! TY

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blizzard7  Oct. 26, 2011 at 17:51

It has been documented that some iPhones have faulty proximity sensors. Some were fixed with software updates, but some were hardware problems. To test this is fairly painless. Just start a call (hopefully you've got included mins), and cover the top part of the phone with your hand, if the screen doesn't switch off, you've got a problem.

Sometimes bad positioning can make it a bit temperamental, so if it does seem to be working, make sure the top section of the phone is pressed against your ear. If it isn't, the proximity sensor may not work but capacitive screens can register touch without you physically touching the screen.

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