Xiaomi Watch 2 Pro. Network bands: Supports 4G / 3G4G: FDD-LTE Band B1/B3/B5/B7/B8/B20/B284G: TDD-LTE Band B38/B40/B413G: WCDMA Band 1,5,8 The independent call function is only available for LTE versions and requires an eligible Android 8.0 and above smartphone device with a separate qualifying wireless plan.