I have a Samsung SCH-S738C. Every few days the phone locks up and has to be rebooted. After re-booting it says that it has a system update to install. I click to install it and it goes through the motions but has the little Android guy on his side with a red Exclamation point at the end and then reboots. I got the phone five months ago and this has gone on a few times a week ever since. The phone does not work correctly when coming and going from different places as far as disconnecting from the current network and Bluetooth devices. Instead it tries to stay connected to the one at my house and just drains the battery. My old Samsung worked correctly and I just bought my mom the exact same phone I have and hers is working correctly. Any suggestions? This is a Straight Talk phone.