Random Reboots: Replace the SIM Card

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http://androidforums.com – Phone/Configuration: Atrix 4G, pretty much the way it came from AT&T (added a few apps from Google Play, adjusted settings, etc.). Symptoms: Random reboots regardless of how it was (or wasn't) being used, EXCEPT in Airplane mode, in which case it wouldn't reboot. Timeframe: I noticed it happening a few times when I first purchased the phone in July 2011, but chalked it up to having purchased "bleeding edge" technology. Somewhere around April 1, 2012 it started rebooting approximately once per hour. AT&T sent me a replacement phone this week. It rebooted while I (General)