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The Apple Watch Series8 cellular version can be connected to the Internet, using the iPhone data network when connected to the iPhone, if there is no iPhone, you need to open an eSIM card, and then you can use the data data separately. To start eSIM, open the Apple Watch App on your phone. After the iPhone is paired with the Apple Watch, find and go to Cellular Mobile Network in My Watch. Click \"Set Up Cellular Mobile Network\". Go to the home page of China Unicom\/Mobile\/Telecom Smart equipment management, read the business description, click Confirm to continue