Unresponsive smartphone touchscreen

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http://forums.androidcentral.com – I don't know what went wrong but when I tried to unlock the screen this morning, the touchscreen didn't respond. I tried to factory reset by boot recovery but I can't select the option "wipe data/factory reset" with power button. I hadn't activated the option 'usb debugging', so I can't use android sdk to factory reset either. (HowTos)