That’s encouraging to hear!
I have family north of Bowie Mill Road in the area northwest of Norbeck Country Club, bounded between 108 to the northeast and 115 to the southwest.
Outdoor coverage in that area has been terrible for years.
Just to let you know . Att is using three band ca 15 mhz in band 2 10 mhz in band 30 and 5 mhz in band 12, in some parts they use 10 mhz of band 4 .Claro started using 3ca with two channels of 10 mhz in band 66 and 10 mhz in band 12 these days , they were just 10 mhz of band 4 until now.T mobile was using just 20 mhz in band 4 now with 5mhz in band 2 added and Sprint as you know uses ca where they have band 41, 5 mhz in band 25 in most parts and band 13 Openmobile coverage
Which device are you using? Other users have reported issued with non-Sprint branded devices not connecting to LTE roaming. In the last couple weeks I was able to connect to USCC LTE roaming with my LG G7 and data was just fine.