I just recently got this new phone, the Galaxy II. But recently my phone have been shutting down by itself, I thought it was the battery at first, but when I turn it back on the battery life is fine. Could it be the internet? I've only been to this website on my phone. There was a time when I plugged my phones USB charger into the PS3 but that's all. Got any suggestions?
If you just got the phone recently you might just want to bring it by wherever you bought it and get a new one.
My mother had a phone that did that, even after she sent it away to get fixed it still did the same thing, either you'll get lucky and they'll actually fix it for you, or just ask for a different one completely to avoid the hassle if they'll allow it, if it's new there shouldn't be an issue.