Different phone bands (US/Canada has different bands, version B)
A version
FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28)
TD-LTE (Bands 34, 38, 39, 40, 41, 42)
WCDMA (Bands 1, 2, 3, 4, 5, 6, 8, 19)
EDGE/GPRS/GSM (850 / 900 / 1800 / 1900MHz)
5G Bands: n1, n2, n3, n5, n7, n8, n12, n20, n28, n38, n77, n78
5G Standalone (SA): n77, n78
B version
FDD-LTE (Bands 1, 2, 3,4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 30, 66, 71)
TD-LTE (Bands 34, 38, 39, 40, 41, 42)
WCDMA (Bands 1, 2, 3, 4, 5, 6, 8, 19)
EDGE/GPRS/GSM (850 / 900 / 1800 / 1900 - SIM 1 & SIM 2)
5G Bands: n1, n2, n3, n5, n7, n8, n12, n20, n25, n40, n38, n66, n71, n77, n78
5G Standalone (SA): n77, n78