I think thousands of people have been through this too Needless to say my Nexus S has Android Jelly Bean 4.2 and the lock button wouldn't work since this morning. I can't go out with my phone like that. I've been looking for a solution for hours but I didn't succeed. Has anybody else fixed this? The removing battery trick with USB plugged won't work. I tired it already. The only temporary solution I found was to download the Proximity Sensor app, to lock and unlock the screen with my fingers over the sensor, but other than that, everything else fails. IT'S URGENT, PLEASE P.S.: I'm kind of a dummy on tech, please try to be easy to understand, I'd be so grateful.