Phone restarts itself

Try a factory reset and see if there's an improvement.

Sent from my Transformer Prime TF201 using Tapatalk 2

Thank you, lorsban for your reply. I'll try what you suggest. After that week, the symptom disappeared for a long time until last Wednesday, in which it re-occured, restarting a couple times a day. Now it's fine again. What really annoys me is I have no idea what might have prompted it, so I can't avoid it. It's just unpredictable.

Hi. My phone is now back to normal *taps wood* but I won't be surprised if it bails on me again one of these days. Like I said, I have no idea what causes it. I just notice that the problem has occured much less since I rooted the phone. Also, I feel that some apps that are required to run 24 hrs. in the background (in my case - some launchers, and some countdown clocks) could be the factor. Apart from doing a factory reset, some people suggest leaving the phone on until its power runs out and shuts down itself before re-charging it might help. I can't see how that's got to do with anything, but it doesn't hurt to try once or twice. Sorry that I can't offer you more useful advice.

I still think SGS, when it works, is generally a great phone for its price, but I probably won't recommend it to anyone who doesn't have time and patience to keep maintaining it.