Samsung SM-G998U Galaxy S21 Ultra 5G UW Dual SIM TD-LTE US 256GB / SM-G998P (Samsung Unbound O3) vs. Samsung SM-M556B/DS Galaxy M55 5G 2024 Premium Edition Global TD-LTE 256GB (Samsung M556) Frequency Band Comparison

Comparison Criteria

Device 1

Device 2

Frequency Band Comparison

Select a band for more details

Frequency Band	Samsung SM-G998U Galaxy S21 Ultra 5G UW Dual SIM TD-LTE US 256GB / SM-G998P (Samsung Unbound O3) View device details	Samsung SM-M556B/DS Galaxy M55 5G 2024 Premium Edition Global TD-LTE 256GB (Samsung M556) View device details
GSM 850 MHz	Yes	Yes
GSM 900 MHz (E-GSM)	Yes	Yes
GSM 1800 MHz (DCS)	Yes	Yes
GSM 1900 MHz (PCS)	Yes	Yes
UMTS B1 (2100 MHz)	Yes	Yes
UMTS B2 (1900 MHz PCS)	Yes	Yes
UMTS B4 (1700/2100 MHz AWS 1)	Yes	Yes
UMTS B5 (850 MHz)	Yes	Yes
UMTS B8 (900 MHz GSM)	Yes	Yes
LTE B1 (2100 MHz)	Yes	Yes
LTE B2 (1900 MHz PCS)	Yes	Yes
LTE B3 (1800 MHz +)	Yes	Yes
LTE B4 (1700/2100 MHz AWS 1)	Yes	Yes
LTE B5 (850 MHz)	Yes	Yes
LTE B7 (2600 MHz)	Yes	Yes
LTE B8 (900 MHz)	Yes	Yes
LTE B12 (700 MHz ac)	Yes	Yes
LTE B13 (700 MHz c)	Yes	No
LTE B14 (700 MHz PS)	Yes	No
LTE B17 (700 MHz bc)	No	Yes
LTE B20 (800 MHz DD)	Yes	Yes
LTE B25 (1900 MHz +)	Yes	Yes
LTE B26 (850 MHz +)	Yes	Yes
LTE B28 (700 MHz APT)	Yes	Yes
LTE B38 (TD 2600 MHz)	Yes	Yes
LTE B39 (TD 1900 MHz +)	Yes	No
LTE B40 (TD 2300 MHz)	Yes	Yes
LTE B41 (TD 2500 MHz)	Yes	Yes
LTE B46 (TD 5900 MHz)	Yes	No
LTE B48 (TD 3600 MHz)	Yes	No
LTE B66 (1700/2100 MHz)	Yes	Yes
LTE B71 (600 MHz)	Yes	No
CDMA BC0 (800 MHz)	Yes	No
CDMA BC1 (1900 MHz PCS)	Yes	No
CDMA BC10 (Secondary 800 MHz)	Yes	No
5G NR N1 (2100 MHz)	No	Yes
5G NR N3 (1800 MHz)	No	Yes
5G NR N5 (850 MHz)	No	Yes
5G NR N7 (2600 MHz)	No	Yes
5G NR N8 (900 MHz)	No	Yes
5G NR N20 (800 MHz)	No	Yes
5G NR N28 (700 MHz)	No	Yes
5G NR N38 (2600 MHz)	No	Yes
5G NR N40 (2300 MHz)	No	Yes
5G NR N41 (2500 MHz)	No	Yes
5G NR N66 (1700/2100 MHz)	No	Yes
5G NR N77 (3700 MHz)	No	Yes
5G NR N78 (3500 MHz)	No	Yes