How to Activate eSIM Cellular Service on Apple Watch Ultra 3

Understanding eSIM on Apple Watch Ultra 3

• 💡 The Apple Watch Ultra 3 with LTE uses eSIM instead of a traditional SIM card.
• ⚠️ The watch must be paired with an iPhone, and most carriers require activating a multi-number share plan, which duplicates your iPhone's number.
• 🚫 It is generally not possible to connect an eSIM with a completely independent phone number.

Carrier Compatibility and Requirements

• 🔑 If your carrier does not support multi-SIM or number duplication, you cannot connect cellular eSIM to your Apple Watch.
• ✅ In this demonstration, the carrier Orange Flags supports an additional SIM card with the same phone number for smartwatches.

Activating eSIM on iPhone

• 📱 The initial step involves connecting the eSIM to your mobile device (iPhone) by showing a QR code and then connecting the mobile plan.
• ⚙️ After activation on the iPhone, click 'Done' and verify that you have an internet or cellular connection on the phone.

Setting Up Mobile Service via Watch App

• ⌚ Open the Watch application on your iPhone and scroll down to find 'Mobile Service'.
• 📞 Click 'Setup Mobile Service', wait for the package to load, and then enter your phone number to log in.
• ➕ You will then have the option to add a new eSIM; follow the prompts, which may vary slightly depending on your carrier.

Confirming Cellular Connection

• ⏳ After a short activation period (less than a minute in the example), the cellular service should be active.
• 📶 You can confirm the cellular mobile service is working on your Apple Watch Ultra 3, showing your operator and connected status.