Not a good sign for the upcoming merger

$15 fee to swap your SIM to a different GSM phone?!?

https://www.prepaidphonenews.com/2018/11/report-metro-by-t-mobile-will-start.html

That sounds like something Sprint would do.

The people have spoken, and the $15+ tax sim swap charge is no longer, at least for current customers.
https://www.androidpolice.com/2018/12/06/metro-by-t-mobile-reverses-15-sim-swap-fee-after-public-outcry/

Bogus charge