So my iphone 4 that is using ios5 keeps freezing when i want to dial, or receive call. i can use all my other apps but cant use the phone to call because the freezing problem. i know some people that are having the same problem too. what can i do?

so my iphone 4 that is using ios5 keeps freezing when i want to dial, or receive call. i can use all my other apps but cant use the phone to call because the freezing problem. i know some people that are having the same problem too. what can i do?

I got the same problem. The percentage of getting this problem is around 10% of all my dial/receive calls.
The problem usually appears when I receive calls. The phone app will freeze, and I cannot dial or receive calls even I closed the phone app, however, most other apps work properly.
Once this problem happens, I will not be able to turn off the phone by holding sleep button, the only way I can get rid of it is holding sleep and home button at the same time to reset the iphone.

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