The Watch GT 2 does support blood oxygen saturation monitoring after all, but Huawei left its Sp02 sensor disabled for six months - NotebookCheck.net News
Amazon.com: HUAWEI Watch GT 2 (42 mm) Smart Watch, 1.2 Inch AMOLED Display, 1 Week Battery Life, GPS, 3D Glass Screen, Real-time Heart Rate Monitoring, International Model, No Warranty- Lake Cyan : Electronics