Watch3 mobile phone eSIM opening method-1, open the sports health App (hurry to download it, treasure the App), then enter the "equipment" interface and click "esim management". 2. The screen of the connection between the mobile phone and the watch will appear in the interface, and click "Open Now". 3. Select the mobile phone number to activate, click "Continue", a text reminder will appear below, and then click "Confirm". If you are a dual-card mobile phone, but only one card is displayed, set the main number as the default data card in SIM card management. 4. Next, a prompt page of "Open eSIM online" will appear, and click "Continue". 5. Read the business opening instructions during the pilot period, and click "Continue" and "Device Opening", both of which can be completed on the same page. Just a reminder, at present, this business is only available in some cities in Shanghai, Tianjin, Guangdong, Gansu, Jiangsu, Sichuan, Zhejiang and Jilin. 6. Read the auxiliary equipment binding instructions and click "Agree". 7. This step is real-name authentication. Enter the reserved certificate name, certificate type, certificate number and service password for handling the main card number, and click "Next". It doesn't matter if you forget the password. Call 10086 to help you reset your password.