Talk:United States/@comment-26674008-20160418072306

It seems now that other users have confirmed that expired T-Mobile SIM cards may be reused: http://www.howardforums.com/showthread.php/1872311-99-cent-prepaid-SIMs-from-T-Mobile?p=16641469#post16641469

The protocol seems to follow: when one has an expired T-Mobile SIM. check first to see if it is really expired (they don't seem to cut off exactly at 90 days, but some time after this) and if it is expired, you need to buy a new activation code. These can be found on eBay for as little as $2.50 or $3. This code is emailed to you after purchase. Then the expired SIM can combine with the new code on the T-Mobile activation website. For voice/SMS you'll get a new number.

Thus if you plan to revisit the US more than once, it appears you can avoid paying for their ridiculous starter kit price or $3/month charge to keep it alive.