Does anyone know why my NEXUS S locks on my at random times of the day? The only way I can get back to my home screen is to remove the Bty. The thing locks on it's own, sometimes after 4 days, and sometimes after 6 hours, no set time. the screensaver is the startup screen, red, yellow, green and blue firework type of thing ending in a X... How do I turn it off or get back into my phone. -- I have attached a click of the screen so you can see what it's doing.