Don't know if you're aware of this, but it's not your phone. You're a minor, you can't sign a phone contract, nor can you have a bank account to pay for the phone.

Your parents merely allow you to have it, and don't kid yourself that your uncle 'gave it to you', he probably checked and got the OK from your parents in the first place.

Nothing you have is yours, you're 14. That might suck, but what sucks more is dealing with some 14 year old brat who thinks they're entitled to a phone that they didn't buy or that they don't pay the bill for.