How to Activate eSIM on Apple Watch SE 3 for Cellular Service

Activating Cellular Service on Apple Watch SE 3

• 💡 To add eSIM to your Apple Watch SE 3 and activate mobile service, your carrier must support both eSIM and a feature often called multisim.
• 🔑 This multisim functionality allows you to share the same phone number across your Apple Watch and iPhone, as the watch essentially duplicates your iPhone's SIM card.

Step-by-Step Activation Process

• 📱 Open the Watch app on your iPhone and scroll down to the Cellular section.
• ⚙️ Tap on Setup Cellular and follow the prompts to log in with your phone number.
• 💳 You may need to manually type your phone number and then log in, potentially receiving a code to verify.
• ✅ The process involves purchasing the multisim plan, which duplicates your SIM card, and then activating it.

Troubleshooting Common Issues

• ⚠️ If the cellular plan shows as "not in use" or there's no connection, it might be due to the eSIM being previously active on another device without being removed.
• 🔄 Restarting your iPhone can sometimes resolve connection issues, and in some cases, restarting the Apple Watch itself might be necessary.
• 📞 If problems persist, contacting your carrier is recommended, as they can help sort out eSIM-related issues.

Verifying Cellular Functionality

• 📶 Once activated successfully, your Apple Watch SE 3 will be able to receive messages, calls, and use cellular data independently of your iPhone.
• ⌚ To restart your Apple Watch, press and hold the side button, then slide to power off, and turn it back on by pressing and holding the side button again.