Samsung Galaxy S21 Ultra 5G Bands

2G B2 (1900), B3 (1800), B5 (850), B8 (900)
3G B1 (2100), B2 (1900), B4 (1700/2100), B5 (850), B8 (900)
4G B1 (2100), B2 (1900), B3 (1800), B4 (1700/2100), B5 (850), B7 (2600), B8 (900), B12 (700), B13 (700), B14 (700), B18 (800), B19 (800), B20 (800), B25 (1900), B26 (850), B28 (700), B29 (700), B30 (2300), B34 (2000), B38 (2600), B39 (1900), B40 (2300), B41 (2500), B46 (5200), B48 (3800), B66 (1700/2100), B71 (600)
5G N1 (2100), N2 (1900), N3 (1800), N5 (850), N7 (2600), N8 (900), N28 (700), N40 (2300), N41 (2500), N66 (1700), N71 (600), N77 (3700), N78 (3500), N79 (4700), N260 (39GHz), N261 (28GHz)

Coverage in Malaysia

2G B3 (1800)B8 (900)
3G B1 (2100)B8 (900)
4G B3 (1800)B5 (850)B7 (2600)B8 (900)B38 (2600)B40 (2300)
5G No

Operators of Malaysia

2G 3G 4G 5G
Celcom B3 (1800)B8 (900) B1 (2100) B3 (1800)B7 (2600) No
Digi B3 (1800)B8 (900) B1 (2100) B3 (1800)B7 (2600)B8 (900) No
Maxis B3 (1800)B8 (900) B1 (2100)B8 (900) B3 (1800)B7 (2600) No
U Mobile B3 (1800)B8 (900) B1 (2100) B3 (1800)B7 (2600) No
Telekom Malaysia No No B5 (850)B40 (2300) No
Yes 4G No No B38 (2600)B40 (2300) No