Getting an iphone 5 to work on tmobile?

I read that Verizon iphone 5's come unlocked even if it was purchased with a contract. They are suppose to be able to work with all GSM carriers. I have tmobile, so I was wondering if I could just buy a Verizon iphone 5 off of craigslist and have it work right away on tmobile. Tmobile sells nano sim cards now, so I won't have to shave my current sim card.

Your going to have to buy a AT&T iPhone 5 because that has a Sim tray which is gsm. Verizon uses CDMA which doesn't have a sim tray. If you do buy it unlocks cost like 7$ on eBay I recommend unlock_fusion they have good feedback from a lot of people and I used them also if your going to tmobile look at their monthly 4g plans and order an activation kit which is 1$ and it comes with the sim and activation code and once your iPhone is unlocked you can activate it online

You could & should just wait until T-Mobile starts selling the phone officially which is expected early this year. Already announced.