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Several people have reported problems with voice echo on their iPhone 4S during calls. The echo does not occur immediately but instead appears anywhere from 30 seconds-12 minutes into a call. It has been further reported that different headsets produce the same results. Temporary Fix: When experiencing the echo, turn the speaker function on and [...]

Users continue to experience an issue in which the iPhone 4 unexpectedly mutes a call, hangs up or engages FaceTime when the device is held up to the ear. This problem occurs due to apparent under-sensitivity of the iPhone 4′s proximity sensor, which turns off the screen (and touch capabilities) when the phone is held to the [...]

Problems (and fixes): Shortened Battery Life Mail Stalls on “Checking for Mail”; Cannot Receive or Send Mail iPhone 3G Slowness Error 29 When Updating No 3G, EDGE or MMS Service iPod App on iPhone Crashes iPhone Reboots/Resets During Phone Calls No Wi-Fi Update Stuck on Backup or Extremely Slow Sync Errors