In my case, it took 2 months to get broken. Things I noticed: * The usb port was really hard to plug. Far more hard than on n810. Also more hard than the preproduction n900 I got. * No special treatment, I don't even use the usb port too much (once every 2-3 days to charge the device). * The "break" incident was: once green light was telling the device was charged, I removed the usb plug, and the female side came with the plug. * Last days before "break" incident, it happened at least two times that I put the device in charger and it didn't charge. I guess it was already partially broken. Tomorrow I'm going to the center Nokia Care redirected me. Let's see what they say.