The ever-expanding 5G Ultra Capacity network that T-Mobile built with the help of Sprint’s mid-band spectrum licenses, is another story altogether, and the main culprit behind T-Mobile’s recent 5G service awards.
The 5G UC mark will denote that you are in an area covered by by its Ultra Capacity 5G network that doesn’t run on the low-bands that its regular 600MHz 5G network does. The low-bands are great when it comes to reach and penetration, so that T-Mobile can bask in 5G coverage glory, but the speeds are commensurate with a 4G LTE network.
That is why T-Mobile is both including Ultra Capacity in its 5G coverage maps now, and intending to show when you are anointed with its presence right on your iPhone 13 display.
T-Mobile’s help desk also says that the 5G UC icon will be available on the iPhone 12 series at some point, too, and it is working with as many other phone makers, supposedly from the Android camp, to bring it to their phones as well.