I highly doubt the iPhone will be open to other companies
It's like how the sidekick is only for T-mobile. They signed a contract with them stating that they would only make sidekicks for T-Mobile, hence why you can only by them from T-Mobile. If you really want, you can get and unlocked iPhone on ebay.
You're better off getting and unlocked smart phone so whenever you want to change phone companies, you can keep it without the hassle. Besides, most smart phones come with music players if that one of your main features that you're looking for.
It's like how the sidekick is only for T-mobile. They signed a contract with them stating that they would only make sidekicks for T-Mobile, hence why you can only by them from T-Mobile. If you really want, you can get and unlocked iPhone on ebay.
You're better off getting and unlocked smart phone so whenever you want to change phone companies, you can keep it without the hassle. Besides, most smart phones come with music players if that one of your main features that you're looking for.