I recently used the T-Mobile Prepaid eSIM app to setup an eSIM with a one-month pre-paid plan for a trip to the US on an iPhone and it was a surprisingly smooth

I recently used the T-Mobile Prepaid eSIM app to setup an eSIM with a one-month pre-paid plan for a trip to the US on an iPhone and it was a surprisingly smooth process. Maybe the post-paid plans are more convoluted due to legacy billing reasons?