I have a samsung galaxy s3. It is only 7 months old. Its battery is not getting charged. I have tried to reboot and take the battery out and put it again,it still doesnt get charged. The usb port is not faulty as others phones get charged from it. What should I do?
I think the USB port of your phone is defective. IMO it's best you get it replaced while warranty is still active(Samsung offers one year warranty)
Try too clean the plug on your phone with a thin needle or brush. I had the same problem than you did, and clening it up solved the problem
You can have a look there: http://www.youtube.com/watch?v=R6p0Eg-yq3A.
If you to this cautiously with proper tools, there is no risk for you to damage the phone.