Samsung SM-G991U Galaxy S21 5G UW Dual SIM TD-LTE US 256GB / SM-G991A (Samsung Unbound M1) vs. TCL 20 5G Global Dual SIM TD-LTE 256GB T781K (TCL T781) Frequency Band Comparison

Comparison Criteria

Device 1

Device 2

Frequency Band Comparison

Select a band for more details

Frequency Band	Samsung SM-G991U Galaxy S21 5G UW Dual SIM TD-LTE US 256GB / SM-G991A (Samsung Unbound M1) View device details	TCL 20 5G Global Dual SIM TD-LTE 256GB T781K (TCL T781) 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	No
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	No
LTE B3 (1800 MHz +)	Yes	Yes
LTE B4 (1700/2100 MHz AWS 1)	Yes	No
LTE B5 (850 MHz)	Yes	Yes
LTE B7 (2600 MHz)	Yes	Yes
LTE B8 (900 MHz)	Yes	Yes
LTE B12 (700 MHz ac)	Yes	No
LTE B13 (700 MHz c)	Yes	No
LTE B18 (800 MHz Lower)	Yes	No
LTE B19 (800 MHz Upper)	Yes	No
LTE B20 (800 MHz DD)	Yes	Yes
LTE B25 (1900 MHz +)	Yes	No
LTE B26 (850 MHz +)	Yes	Yes
LTE B28 (700 MHz APT)	Yes	Yes
LTE B29 (700 MHz de)	Yes	No
LTE B30 (2300 MHz WCS)	Yes	No
LTE B32 (1500 MHz L-band)	No	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 B66 (1700/2100 MHz)	Yes	No