T-Mobile Pre-paid, Pre-Loaded, Activated sim card, Choose your Plan $10-$60 | eBay
T-Mobile Micro SIM Card Activation Kit
US T-Mobile Prepaid SIM Activation Guide – dataGO
You can now self activate t-mobile SIM to TNX program from Sprint.com website. I have successfully activated it on Samsung Galaxy A71 today using t-mobile R15 sim card. Download t-mobile App experience