U1 model is unlocked....u model is carrier...check out the specs and model numbers...not to mention that the full carrier firmware Downloads for each carrier are for U model and all unlocked firmwares are for U1 models...how about this...you flash the firmware for U1 models, whichever u like, and then tell us if any have any carrier bloat...I've checked 5 so far...let's see

the reason you see unlocked with U is because we can flash carrier firmware...Ive done it several times now and changed my UNLOCKED U1 to Carrier
U....then I flashed back and....yep....changed back to U1...