So, it's a little goofy because I switched from Verizon a few months back so I'm using a different SIM now. It's not a T-Mobile company, but it uses T-Mobile towers.
Hey Mustang, the CSC has to be XAA for this, correct? When I search in Frija, XAA doesn't come up with any matches when I check for firmware for my phone (SM-G991U).