My phone does the same thing. I'm hoping the method "let the battery die and charge it" works!!! But the notification lights up crazy and my screen flashes showing me the message "USB and charge" and when it's on vibration it goes crazy vibrating and when the ringtone is on it beeps. In scared what other method does anyone have. I think I might have to take it to the repair shop. Any more suggestions??? LMK. Thanks
I would try what LordVincent mentioned and make sure that your charging port is clean. If that doesn't work, try doing a factory reset? You'll lose everything on the phone if it's not backup up with an app like Titanium but as long as you have a gmail account you'll be able to get your contacts back. I don't know if you're rooted or not but you can do a factory reset even if you don't have root.
From a powered off phone, press volume up and power at the same time until a black screen with blue writing comes up, then let go of the buttons. Using the volume buttons, scroll down to the wipe data/ factory reset option. Use the camera button to select and do a factory reset. Hopefully that will fix your phone.
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