I am a current T-Mobile prepaid customer. I love my number and I have several elderly family members who would struggle to fix my number in their phones (etc.), so it's very important to me to keep it. I just purchased a new phone and would like to transfer my number to the new SIM ahead of time (I currently have a micro and it will require a nano), so I got a new SIM "3-in-1" card. How can I transfer my current number to the new SIM? Going to "tmobile.com/sim" just directs me to my account. Any help would be very much appreciated.
gramps28 is correct. You'll have to visit a T-Mobile store or call 611. If you decide to call 611 from your phone, once your SIM is updated the call will drop due to the SIM being updated. However, you can also call 1-877-778-2106. Prepaid agents are available from 4:00 a.m. to 11:00 p.m. PT, daily.
Manage your T-Mobile account