Hardware : it is same hardware use for both model
However we found some connection was hide for tmobile version , see below explain
For Huawei B618s22d Tmobile it is hidden
1 X TEL PORT and 1 X USB PORT from plastic cover
After open plastic cover, it found 1 X TEL PORT and 1 X USB PORT is behind it !
Photo below showing backcover for model huawei b618s22d international version