Band Frequencies :
2G GSM : B2 (1900), B3 (1800), B5 (850), B8 (900)MHz
3G WCDMA : B1 (2100),, B2 (1900), B5 (850), B8(900)MHz
3G TD-SCDMA : B34 (2100), B39 (1900)MHz
4G LTE-FDD : B1 (2100), B2 (1900), B3 (1800), B5 (850), B7 (2600), B12 (700), B20 (800)MHz
4G LTE-TDD : B38 (2600MHz), B39 (1900), B40 (2300), B41 (100)MHz
You want to use a sim card that matches the above bands so You’ll enjoy the convenience of wireless networking
System: Android 7.1 OS
CPU Model: MTK6739 Quad-core
RAM+ROM: 1GB+16GB, 3GB+32GB (Optional)
Screen Size: 2.86inches 640*480p
Touch Mode: Multi-touch
Brand Name : JingTider DM100 4G Smart Watch
Network Mode: 4G
Nano SIM Card Slot: Yes
BT Version: 4.0
APP Download To be had: Yes
Clock Interface: Selectable
Waterproof Grade: IP67 Waterproof
Battery Capacity: 2700mAh Lithium polymer battery
APP Improve Language: English
Watch Improve Language: Chinese Simplified, Chinese Traditional, English, French, German, Spanish, Portuguese, Italian, Russian, Polish, Turkish, Korean, Hebrew, Indonesian, Vietnamese, Arabic, Persian, Thai, Hindi, Burmese, Bangladesh, Japan
APP Name: WiiWatch 2
Built-in Nano SIM Slot:Supports independent 4G call function. Just plug in your Nano SIM card to make a call straight away, no want to carry your mobile phone when exercising.
Pedometer & Heart Rate Monitoring:Intelligently calculate your motion steps and distance, caring for your health. Supports recording your heart rate to keep abreast of your physical condition.
Larger HD Screen:2.86-inch round touchscreen with a resolution of as much as 640*480p, the picture is smooth and clear, stylish and cool without losing vitality.
More Convenience:Supports BT, GPS navigation and WiFi. Built-in big speakers, You’ll enjoy music on every occasion and wherever you wish to have. 5MP HD camera records each good moment.
IP67 Waterproof:This smartwatch is life waterproof and sweatproof. You’ll wear it to wash your hands and in rain, but You’ll not wear it when having a bath and swimming.