4G sim card smart watch Specification description
Product
Android Smart Phone Watch
Model
B31
Network
2G/3G/4G
Side key
Power key/SOS
Rotate button
Support, Mechanical encoder
Chipset
Spreadtrum W377E
DDR SDRAM
1GB
Flash EEPROM
4GB
OS
Android 8.1.0
Language
English
2G Band/Frequency
B2/B3/B5/B8
3G Band/Frequency
B1/B2/B5/B8
4G Band/Frequency
FDD-LTE :B1/B2/B3/B4/B5/B7/B8/B12/B17/B20/B28 TDD-LTE : B38/B39/B40/B41
Size
1.53" 368*448 AMOLED
Battery
850mAh
