Download your favorite apps through the Google Play Store or. The stated ROM amount shows the maximum available ROM with nothing installed. However, the Android/Windows OS and pre-installed software from the manufacturer will occupy some of this ROM. The available ROM on the device will, therefore, be slightly less than the ROM listed. Make phone call directly from the smartwatch, including answering and dial-up. This watch supports GSM: 850/900/1800/1900MHz（3G）; Call, hand free, call record, phone book; the Bluetooth phone call It supports anti-lost, phone book, remote camera, XIAOMI etc.