Currently Being ModeratedMar 19, 2013 10:54 AM (in response to isakov)
Clean iPhone charging port with clean dry toothbrush. See if better. If still problem, and if there is Warranty or AppleCare, make Genius reservation or set up service and take or send to Apple for resolution. If no coverage, clean again with toothbrush and small amount of Isopropyl Alcohol.