Kids will want whatever phone is hip and cool at the time. Things to watch out for with contracts, the cost if you use all your minutes up or are calling premium numbers or using a lot of data. If he's under 18 he will have to get it in an adults name and if it all goes wrong they cop for the bad credit. Things are not as bad cost wise as they used to be as most networks give free minutes/texts and some free tinternet. The one thing with PAYT is once the credits gone that's it. Oh and one last thing whatever phone they get make sure they have a good protective case for it, if you break the phone you still pay the contract.