Why won't my iPhone 4 charge? - 2

Alright, so I have an iPhone 4 and it just stopped being charge able. When I plug my charger in It either says Charger not supported with this device, (when its the Apple charger) it will also show the little symbol that shows it's fully charged when its not sometimes, or it won't recognize anything at all. I've tried blowing all possible lint that could be stuck in there, using several different chargers… Help me out please. I have AT&T service I could take it in their but they would just tell me to send it to Apple. I don't really want to do that but I will if it comes down to that.

Restore it in itunes.

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