Samsung SM-G991U Galaxy S21 5G UW Dual SIM TD-LTE US 128GB / SM-G991T (Samsung Unbound M1) vs. QiGi i55 / i55P (TechFaith Cynthia 850) Frequency Band Comparison

Comparison Criteria

Device 1

Device 2

i55 / i55P (TechFaith Cynthia 850) View full device details

Frequency Band Comparison

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Frequency Band	Samsung SM-G991U Galaxy S21 5G UW Dual SIM TD-LTE US 128GB / SM-G991T (Samsung Unbound M1) View device details	QiGi i55 / i55P (TechFaith Cynthia 850) 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	No
UMTS B2 (1900 MHz PCS)	Yes	No
UMTS B4 (1700/2100 MHz AWS 1)	Yes	No
UMTS B5 (850 MHz)	Yes	No
UMTS B8 (900 MHz GSM)	Yes	No
LTE B1 (2100 MHz)	Yes	No
LTE B2 (1900 MHz PCS)	Yes	No
LTE B3 (1800 MHz +)	Yes	No
LTE B4 (1700/2100 MHz AWS 1)	Yes	No
LTE B5 (850 MHz)	Yes	No
LTE B7 (2600 MHz)	Yes	No
LTE B8 (900 MHz)	Yes	No
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	No
LTE B25 (1900 MHz +)	Yes	No
LTE B26 (850 MHz +)	Yes	No
LTE B28 (700 MHz APT)	Yes	No
LTE B38 (TD 2600 MHz)	Yes	No
LTE B39 (TD 1900 MHz +)	Yes	No
LTE B40 (TD 2300 MHz)	Yes	No
LTE B41 (TD 2500 MHz)	Yes	No
LTE B46 (TD 5900 MHz)	Yes	No
LTE B48 (TD 3600 MHz)	Yes	No
LTE B66 (1700/2100 MHz)	Yes	No
LTE B71 (600 MHz)	Yes	No