Wireless Joint

I got a notice that Caylx is adding T-Mobile roaming support when Sprint is not available. Given that we can lock bands on our devices, we can easily make that happen. However, I have not been able to connect to any T-Mobile towers. I've tried band locking with r.ispsn APN, as well as swapping to T-Mobile's APN, but get no connection.

Has anyone figure out how to get Caylx based sims to work on the T-Mobile network?

I've read elsewhere someone finding that somehow band locking doesn't do it. They were able to access tmobile bands when Sprint bands were truly not available, but not when they band locked. Odd really.