Interesting acquisition announced today....Blackberry to acquire Good Technologies. For those of you who don't know or are familiar with Good, it's basically a BYOD platform for enterprises. (Email, intranet, etc.) Not necessarily directly Sprint related, but many people use both.
I've seen some threads recently about the differences between SIM/UICCs and though posting a compatibility matrix would help people.
This is pretty straightforward. The matrix has every Sprint LTE device, and what UICC card is meant for that device. Mix and matching UICC card types probably will not work, but swapping around UICC cards for devices that use the same type of card should work properly.
Keep in mind, you cannot simply move your UICC card to another phone to use it. Sprint's device authentication system still requires the correct UICC and MEID to be on the account to authenticate properly and work.
A full deployment has never been T-Mobile's strategy, and that's why they've never been the best in Seattle. Despite having the best site density (by a lot), their network experience falls far short of AT&T, Sprint and even Verizon now, who I would have claimed was in last place a year ago.
The trend for the last 4 years has been that AT&T and Verizon never climb a tower without deploying every LTE technology available at that time. Even today, the same cannot be said for T-Mobile.
I would estimate that more than 35% of T-Mobile sites in Seattle are still midband only. And some are still B2-only whereas others are B4-only. That makes coverage/capacity inconsistent between sites and handovers at the edge of cell sloppy, to say the least.
To really compete with the big two, they're going to have to rethink the way they're deploying their RAN and stop deploying the minimum needed to get by. Hopefully we see those changes going forward, because they definitely have the economies of scale necessary to do so now.
Don't forget that the US Government paid AT&T $6.5 billion to deploy B14 FirstNet spectrum. AT&T took advantage of those subsidized tower climbs to upgrade its own infrastructure to 5G-ready, and add all of its spectrum holdings. Smart move.
T-Mobile doesn't have that subsidy, but I agree that any tower they're going to touch from here on out should be fully upgraded, and I think we'll see that with the Sprint "keep" sites for sure, plus anywhere they add NR equipment.