Set up cellular on Apple Watch

• Make sure that you have the latest software on your iPhone and your Apple Watch.
• Check for updates to your carrier settings.
• Make sure that you have an eligible cellular service plan with a supported carrier. Your iPhone and Apple Watch must use the same carrier,* and you must be within your carrier's network when you set up cellular on your watch.
• If you have an enterprise or corporate cellular service plan, check with your company or carrier to see if they support this feature. Pre-paid accounts and some older accounts aren’t currently supported. To make sure that your account is eligible, contact your carrier.

* An Apple Watch that you set up for a family member can use a different carrier than your iPhone uses.

You can activate cellular when you first set up your Apple Watch, or when you set up a watch for a family member. During setup, look for the option to set up cellular, then follow the onscreen steps.

You can also set up cellular later from the Apple Watch app:

1. On your iPhone, open the Apple Watch app.
2. Tap the My Watch tab, then tap Cellular.
3. Tap Set Up Cellular.
4. Follow the instructions for your carrier. You might need to contact your carrier for help.

You might see a phone number assigned to your Apple Watch that differs from the phone number assigned to your iPhone. The number shown for your Apple Watch is for your carrier's billing or tracking purposes only; your iPhone and Apple Watch share the same number.

You can set up a cellular Apple Watch for a family member who doesn't have their own iPhone. If your cellular carrier supports the use of a managed Apple Watch, you're given the option to add the watch to your plan during setup. Look for the option to set up cellular, then follow the onscreen steps. If your carrier doesn't support cellular on a managed Apple Watch, you might be able to use an alternative carrier. 

If you don't initially set up cellular on your family member's Apple Watch, you can do it later:

1. Open the Apple Watch app on your iPhone.
2. Tap All Watches, tap your family member's Apple Watch, then tap Done.
3. Tap Cellular, then tap Set Up Cellular.
4. Follow the instructions for your carrier. You might need to contact your carrier for help.

To see the phone number assigned to your family member's Apple Watch after you set up cellular, go to Settings on the watch, then tap Phone. 

Setting up a managed Apple Watch for a family member is available only in certain countries or regions.

If you're in China mainland, you must verify your identity when setting up cellular on a family member’s Apple Watch, as required by local regulations. Contact your carrier for further assistance if needed.

Your Apple Watch with cellular automatically switches to the most power-efficient wireless available: It can connect to your iPhone when itʼs nearby, a Wi-Fi network, or cellular. When your watch connects to cellular, it uses LTE networks. If LTE isn't available, your watch will try to connect to UMTS if your carrier supports it. 

When your watch connects to a cellular network, you can check the signal strength from Control Center or the Cellular complication that you can add to most watch faces. To open Control Center, touch and hold the bottom of the screen, then swipe up.

Learn what your Apple Watch can do while connected to Wi-Fi or cellular, even when your iPhone isn't nearby.

Your iPhone and Apple Watch must use the same carrier, unless the watch was set up for a family member who doesn't have an iPhone. If you change carriers on your iPhone, you need to remove the previous service plan on your Apple Watch and sign up for a new plan.* Here's how:

1. On your iPhone, open the Apple Watch app. 
2. Tap the My Watch tab, then tap Cellular. 
3. Your Apple Watch should automatically switch to the carrier that your iPhone is using. If you need to add a new plan, tap Add a New Plan, then follow the onscreen steps. If your previous plan still appears in the Apple Watch app, you can remove it.

If you need help, contact your carrier. 

* Carrier fees may apply. Contact your carrier for details. 

When you’re ready to start using a new Apple Watch, you can transfer cellular service from your old watch to your new one. Here’s how:

1. Remove the cellular plan from your old Apple Watch. You can do this from the Apple Watch app or by erasing your old Apple Watch. 
2. Pair your new Apple Watch with your iPhone. During setup, tap “Set up Cellular” to add a cellular plan.
3. Some carriers allow you to transfer your existing plan to your new Apple Watch directly from the Apple Watch app. 
4. If you don’t see an option to transfer your cellular plan, contact your carrier for help.

You can remove your cellular plan at any time:

1. On your iPhone, open the Apple Watch app. 
2. Tap the My Watch tab, then tap Cellular. 
3. Tap the information button  next to your cellular plan at the top of the screen. 
4. Tap Remove [carrier] Plan. Tap again to confirm. 
5. You might need to contact your carrier to cancel your cellular subscription.*

When you erase and unpair your Apple Watch, you also get the option to remove the plan from your Apple Watch. When asked, choose Erase All to remove the plan. 

* Carrier fees may apply. Contact your carrier for details. 

With watchOS 9.1 and later, international roaming is available on cellular models of Apple Watch Series 5 and later, Apple Watch SE and later, and Apple Watch Ultra. 

To get international roaming on your Apple Watch, contact your iPhone carrier to add your watch to your iPhone cellular roaming plan. For international roaming to work on your Apple Watch, your carrier must support VoLTE and roaming. Not all carriers support international roaming on Apple Watch and coverage in other countries is determined by your carrier.

To turn on international roaming, open the Settings app on your Apple Watch. Tap Cellular, then turn on Data Roaming.

To cover the LTE and UMTS bands used around the world, cellular models of Apple Watch come in regional models for the Americas, China mainland, and Europe/Asia Pacific. Unlike iPhone, there isn't a worldwide Apple Watch model that supports all cellular bands used globally. Find out which carriers in your country or region offer cellular service for Apple Watch.

• To check your cellular data usage, use the Apple Watch app. Open the app on your iPhone, tap the My Watch tab, tap Cellular, then scroll to the Cellular Data Usage section. 
• To turn your cellular connection on or off, swipe up from the watch face to open Control Center. Tap the cellular button , then turn Cellular on or off.
• Turning on cellular for extended periods uses more battery power. Also, some apps might not update without a connection to your iPhone. 
• To receive SMS, MMS, or push notifications from third-party apps on your Apple Watch with cellular, your paired iPhone must be powered on and connected to Wi-Fi or cellular.
• Learn how to use Dual SIM with cellular models of Apple Watch.