Looks like T-Mobile is taking a page from Helpful Honda...

Let's say you have an iPhone on a zero interest finance plan with T-Mobile and decide to move to Verizon, or any other carrier for that matter. For those thinking about leaving T-Mobile for another carrier, TM just made things much easier. Now it's possible to move your service to another carrier and continue paying your T-Mobile monthly equipment charge off without having an accompanying wireless plan with charges.

Beginning August 26, TM customers who start a new EIP with a device promotion will have the option to cancel their service without having to pay off their EIP balance.

Important Details

• This option is only for customers with an existing postpaid EIP promotion (started on or after August 26) who wish to leave T-Mobile but keep their EIP active.
• The No Service EIP rate plan is only available through Customer Care.
• Tablets and accessories on EIP are not eligible for this plan.

Obviously, all carriers have buyout options but usually make you trade in your device and zero interest finance a new one from them. If you have a good device and merely wish to change carriers, contact me!