T‑Mobile Takes Hassle and Worry Out of Switching ‑ T‑Mobile Newsroom
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
The T-Mobile Network Experience (TNX) - Next Step in Transitioning Sprint Customers - Mobile Internet Resource Center
Report: T-Mobile reminds Sprint SIM customers to switch before May 1st End of Life - TmoNews
Here's Why Your Sprint SIM Card Just Stopped Working
Swap Out Your Sprint SIM to Join T-Mobile's Network | Sprint