My iPhone won't charge even though it is plugged in

Ok so I put it on charge and ever second it just buzzes, like its on silent so it buzzes, but it won't remain on charge it will buzz and then buzz again, for like 5 min straight this has been happening. I have an iPhone 4s and its only 5 months old, Can anyone please help me, i will really appreciate it! * lol so it won't remain on charge, it will charge not charge and then charge, it just won't do one thing, it changes every second

Have you tried cleaning the port in your phone you plug the charger into? You'd be surprised how much dust lint etc can get in there. Good luck, also have you tried with another charger? It could be your charger.

You should try another charger, at least another cable. If it charges normally, then you need a new charger cable. Otherwise bring your iphone to Apple for repair.