Samsung buying Galaxy S4 16gb

Product Name: Samsung buying Galaxy S4 16gb
Mint like new Samsung Galaxy S4 on U.S. Cellular R970 CDMA model ,. This phone looks and feels like new had plastic sticker wrap around the silver bezel which rubbed off I have not used the phone. I tried putting my TMobile sim and it didn't sync to my network. Although it states that us cellular phones come unlocked This phone is great if you're using us cellular or if you have experience with updating the rom, I've heard rom updates buying unlock network capabilities. Thanks.