These days I either have 5G UC or no coverage at all. The 5G UC marketing is now more meaningless than it was before since as of earlier this year it now incorporates n25 + whatever magical bonding, instead of it just being the simple concept of 5G UC = n41. Here's some 5G UC goodness near the TN/AL border from yesterday, about 10 - 15 minutes outside of South Pittsburgh.
1500 miles into this road trip and T-Mobile's coverage is about what I expected. Great on the interstates, 1+ Gbps in major metro areas and completely non existant on the backroads of Kentucky, Tennessee and the S. Tenessee/N. Alamaba/N. Gerogia tristate area once you are away from Chattanooga.