I've just recently rooted my phone, and installed WiFi Tether. I noticed that while I am using it, the phone wil power off after about 15 minutes. I power it up and rinse and repeat. Any idea what could be causing this? Not sure if it is a power issue, as I never got to look at the temp before powering off. BTW, what is the best way to monitor temp? I have a SF. Thanks!