I have a EXHIBIT 11 4G, it is a T-Mobile phone. The phone is not unlocked as of now. When I scan to see what Networks are available, I get AT&T , also NEP, a small company,located in North PA. I get no good signal from T-Mobile in house and about 3 miles from house. The phone connects to NEP and I get full bars, I also connected to AT$T in another area. I take it T-Mobile allows these Networks to use their Towers and visa versa?