My Captivate phone is intermittent. It randomly goes black, freezes, drops my call, fails to get text messages and it loses my bluetooth connection. It appears to be in sleep mode, but when I try to take wake it by pressing the power button, nothing happens. To get it to unfreeze, I remove the battery and SIM card, but it continues to randomly restart the operating system and performs a media scan. Sometimes, it just restarts the operating system without going through the sleep mode. After many attempts and ending up copying the files in batches, I have been able to backup my phone and I am ready to perform a factory reset, but I am concerned that the problem is a bad update installation. Any ideas, anyone?