A:Answer From the "From the Manufacturer" section in the item description...
4G FDD LTE
B1(2100), B2(1900), B3(1800),
B4(AWS), B5(850), B7(2600),
B12(700), B13(700), B14(700),
B20(800), B25(1900), B26(850),
B29(700), B30(2300), B66(AWS-3), B71(600)
4G TDD LTE
B38(2600), B39(1900), B40(2300),
B41(2500), B48(3600)
SIM Slot Type
SIM 1 + SIM 2 + MicroSD
5G FDD Sub6
N2(1900), N5(850), N66(AWS-3), N71(600)
5G TDD Sub6
N/A
5G TDD mmWave
N41(2500), N48(3500), N77(3700)