Apple Watch Series 7 45mm TD-LTE NA A2477 (Apple Watch 6,9) vs. BBK vivo Y21T 2021 4G Standard Edition Dual SIM TD-LTE V3 BD 128GB V2135 (BBK V2135) Frequency Band Comparison

Comparison Criteria

Device 1

Device 2

Frequency Band Comparison

Select a band for more details

Frequency Band	Apple Watch Series 7 45mm TD-LTE NA A2477 (Apple Watch 6,9) View device details	BBK vivo Y21T 2021 4G Standard Edition Dual SIM TD-LTE V3 BD 128GB V2135 (BBK V2135) View device details
GSM 850 MHz	No	Yes
GSM 900 MHz (E-GSM)	No	Yes
GSM 1800 MHz (DCS)	No	Yes
UMTS B1 (2100 MHz)	Yes	Yes
UMTS B2 (1900 MHz PCS)	Yes	No
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)	No	Yes
LTE B12 (700 MHz ac)	Yes	No
LTE B13 (700 MHz c)	Yes	No
LTE B14 (700 MHz PS)	Yes	No
LTE B17 (700 MHz bc)	Yes	No
LTE B18 (800 MHz Lower)	Yes	No
LTE B19 (800 MHz Upper)	Yes	No
LTE B20 (800 MHz DD)	No	Yes
LTE B25 (1900 MHz +)	Yes	No
LTE B26 (850 MHz +)	Yes	No
LTE B38 (TD 2600 MHz)	No	Yes
LTE B39 (TD 1900 MHz +)	Yes	No
LTE B40 (TD 2300 MHz)	Yes	Yes
LTE B41 (TD 2500 MHz)	Yes	Yes
LTE B66 (1700/2100 MHz)	Yes	No