so I'm getting my brother a 3g iPhone to eventually be unlocked and used on t-mobils when the jailbreak software is released. My uncle is eligible for an upgrade so I'm going to have him buy it activate it then just deactivate it and switch his acct back to his old phone. My question is basically what, if any, issues would I run into? Does this seem like a relatively easy plan to execute. Any and all help is appreciated.