The supported card frequency bands are as follows: (please check carefully before placing an order, thank you!)

Overview:
DM100 4G Smartwatch integrates with Pedometer, Heart Rate Tracker, Message Reminder, Interactive Music, Calendar, Dial Call, Push Message, Alarm Clock, Answer Call, Date & Time, Camera, Sound Recorder and Browser. Android 7.1, MTK6739 Quad-core CPU, 1GB RAM+16GB ROM/3GB RAM+32GB ROM Optional, BT & WiFi supported, meet all your needs. This smartwatch will bring you much fun and convenience.

Features:
OS & Configuration:
Runs on Android 7.1 OS, powered by high-performance MTK6739 Quad-core CPU. 1GB RAM+16GB ROM (or 3GB RAM+32GB ROM Optional) ultimately deliver a richer using experience.
Built-in Nano SIM Slot:
Supports independent 4G call function. Just plug in your Nano SIM card to make a call directly, no need to carry your mobile phone when exercising.
Pedometer & Heart Rate Monitoring:
Intelligently calculate your motion steps and distance, taking care of 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 up to 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 can enjoy music whenever and wherever you want. 5MP HD camera records every good moment.
IP67 Waterproof:
This smartwatch is life waterproof and sweatproof. You can wear it to wash your hands and in rain, but you can not wear it when having a bath and swimming.

Specifications:
Model Number: DM100
Type: On Wrist Smartwatch
Function: Pedometer, Heart Rate Tracker, Message Reminder, Interactive Music, Calendar, Dial Call, Push Message, Alarm Clock, Answer Call, Date & Time, Camera, Sound Recorder...
Communication Program:
2G:
GS: B2+B3+B5+B8
3G:
WCDMA: B1+B2+B5+B8
TD-SCDMA: B34/39
4G:
LTE-FDD: B1+B2+B3+B5+B7+B8+B12+B20
LTE-TDD: B38+B39+B40+B41(100MHz)
System: Android 7.1 OS
CPU Model: MTK6739 Quad-core
RAM+ROM: 1GB+16GB, 3GB+32GB (Optional)
Screen Size: 2.86inches
Resolution: 640*480p
Screen Shape: Round
Touch Mode: Multi-touch
Camera: 5MP
Network Mode: 4G
Nano SIM Card Slot: Yes
BT Version: 4.0
GPS: Yes
APP Download Available: Yes
Clock Interface: Selectable
Recording: Yes
Speaker: Yes
Waterproof Grade: IP67 Waterproof
Battery Capacity: 2700mAh Lithium polymer battery
APP Support Language: English
Watch Support 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
Case Material: Alloy
Band Material: Silica Gel
Color: Black, Silver (Optional)
Item Weight: 155g/5.45oz
Package Size: 11.0*9.5*8.0cm/4.33*3.74*3.15in
Package Weight: 350g/10.65oz

Package List:
1 * 4G Smartwatch
1 * Charging Cable
1 * Screw Driver
1 * Screen Film
1 * User Manual (English / Chinese)