[?] 100% Screen Lock / Phone Lock

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http://forum.xda-developers.com – is there anyway to lock this phone so when its in your pocket and you're jamming out to some tunes, the screen doesnt turn on or the volume doesnt change? I've had this phone unlock it self and its beyond annoying. Also the screen will be off, phone locked, and if i get an email or text or what ever, the screen comes on every time. It didnt bother me at first but its starting to get to me now. (HowTos)