I currently ported in T-Mobile with a Simply Prepaid Plan ($40).
When I tried to access the T-Mobile app, it showed
"Sorry we're not ready for you yet. We're working on improving your app experience."
I had already tried to unload and reinstall the app several times, but still in vain.
I wonder is this usually happened to people just ported in T-Mobile?
If anyone had this problem before can provide me solutions, thank you.
Best answer by tmo_chrisView original