Asus ZenFone 7 2020 Premium Edition Global Dual SIM TD-LTE ZS670KS 128GB (Asus S670) 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

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Frequency Band	Asus ZenFone 7 2020 Premium Edition Global Dual SIM TD-LTE ZS670KS 128GB (Asus S670) 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	Yes	Yes
GSM 900 MHz (E-GSM)	Yes	Yes
GSM 1800 MHz (DCS)	Yes	Yes
GSM 1900 MHz (PCS)	Yes	No
UMTS B1 (2100 MHz)	Yes	Yes
UMTS B2 (1900 MHz PCS)	Yes	No
UMTS B3 (1800 MHz DCS)	Yes	No
UMTS B4 (1700/2100 MHz AWS 1)	Yes	No
UMTS B5 (850 MHz)	Yes	Yes
UMTS B6 (850 MHz Japan)	Yes	No
UMTS B8 (900 MHz GSM)	Yes	Yes
UMTS B19 (800 MHz Japan)	Yes	No
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 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)	Yes	Yes
LTE B26 (850 MHz +)	Yes	No
LTE B28 (700 MHz APT)	Yes	No
LTE B29 (700 MHz de)	Yes	No
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
5G NR N1 (2100 MHz)	Yes	No
5G NR N2 (1900 MHz)	Yes	No
5G NR N3 (1800 MHz)	Yes	No
5G NR N5 (850 MHz)	Yes	No
5G NR N7 (2600 MHz)	Yes	No
5G NR N8 (900 MHz)	Yes	No
5G NR N12 (700 MHz)	Yes	No
5G NR N20 (800 MHz)	Yes	No
5G NR N28 (700 MHz)	Yes	No
5G NR N38 (2600 MHz)	Yes	No
5G NR N77 (3700 MHz)	Yes	No
5G NR N78 (3500 MHz)	Yes	No