Just a reminder: there is some potential risk involved with this procedure. In particular, don't rush it. You must ensure that the port into T-Mobile is completely finished before subsequently porting to GV, or you will end up with a mess. By "finished", I mean that you've added some money to the T-Mobile account so you can make and receive phone calls and text messages, you've tested that those things work, and you have set your own PIN for your T-Mobile account. You will need that PIN when you initiate the port to GV. The GV porting form will initially not have a place to enter the PIN. Submit it anyhow. It will email you with an error notice. Go back to the porting form, fill in the now-visible PIN field, and submit. The port will now begin.