Apple Watch Series 4 40mm TD-LTE NA A1975 (Apple Watch 4,3) vs. Oppo A57 4G 2022 Premium Edition Dual SIM TD-LTE V3 BR CO PE CL 128GB CPH2387 (BBK 2387) Frequency Band Comparison

Comparison Criteria

Device 1

Device 2

Frequency Band Comparison

Select a band for more details

Frequency Band	Apple Watch Series 4 40mm TD-LTE NA A1975 (Apple Watch 4,3) View device details	Oppo A57 4G 2022 Premium Edition Dual SIM TD-LTE V3 BR CO PE CL 128GB CPH2387 (BBK 2387) View device details
GSM 850 MHz	No	Yes
GSM 900 MHz (E-GSM)	No	Yes
GSM 1800 MHz (DCS)	No	Yes
GSM 1900 MHz (PCS)	No	Yes
UMTS B1 (2100 MHz)	No	Yes
UMTS B2 (1900 MHz PCS)	Yes	Yes
UMTS B4 (1700/2100 MHz AWS 1)	Yes	Yes
UMTS B5 (850 MHz)	Yes	Yes
UMTS B6 (850 MHz Japan)	No	Yes
UMTS B8 (900 MHz GSM)	No	Yes
UMTS B19 (800 MHz Japan)	No	Yes
LTE B1 (2100 MHz)	No	Yes
LTE B2 (1900 MHz PCS)	Yes	Yes
LTE B3 (1800 MHz +)	No	Yes
LTE B4 (1700/2100 MHz AWS 1)	Yes	Yes
LTE B5 (850 MHz)	Yes	Yes
LTE B7 (2600 MHz)	No	Yes
LTE B8 (900 MHz)	No	Yes
LTE B12 (700 MHz ac)	Yes	Yes
LTE B13 (700 MHz c)	Yes	Yes
LTE B17 (700 MHz bc)	Yes	Yes
LTE B18 (800 MHz Lower)	Yes	Yes
LTE B19 (800 MHz Upper)	Yes	Yes
LTE B25 (1900 MHz +)	Yes	No
LTE B26 (850 MHz +)	Yes	Yes
LTE B28 (700 MHz APT)	No	Yes
LTE B38 (TD 2600 MHz)	No	Yes
LTE B41 (TD 2500 MHz)	Yes	Yes
LTE B66 (1700/2100 MHz)	No	Yes