T-Mobile prepping updates to Assisted Support and SIM card charges, leaked docs show - TmoNews
Quick and Easy Guide to Activate Your T-Mobile SIM - UnlockBase
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
NEW TMobile SIM 4G LTE OEM NANO Sim Card TRIPLE CUT SIM 3 IN 1. REPLACEMENT SIM | eBay