
Adding an Apple Watch to an existing AT&T plan is possible, but the process can be time-consuming and challenging. AT&T offers a range of Apple Watch plans and deals, including trade-in offers, and it is essential to compare the costs and plan eligibility before proceeding. The process involves updating the Apple Watch's EID on AT&T's servers, which currently requires contacting customer support. Additionally, ensuring the latest iOS and watchOS versions are installed is crucial to prevent compatibility issues. The Apple Watch app plays a central role in setting up cellular service and NumberSync, which allows the watch and phone to work together seamlessly. AT&T provides various options for data usage, and users can choose a plan that suits their needs.
| Characteristics | Values |
|---|---|
| Cost | Pay an additional monthly fee as low as $10 |
| Phone line requirement | You'll need a phone line on your account to add a non-phone device |
| Plan eligibility | Not all AT&T plans support adding a smartwatch. Verify plan eligibility by logging into your account online or calling customer service |
| NumberSync | AT&T's way of making your phone and watch work together seamlessly. Your watch shares the same number as your phone |
| Trade-in offers | AT&T often runs promotions that include trade-in offers. The trade-in program allows you to exchange your old device for bill credits toward your new Apple Watch or other AT&T products |
| Software update | Ensure your iPhone and Apple Watch are running the latest iOS and watchOS versions to avoid compatibility issues |
| Activation process | Open the Apple Watch app on your iPhone, go to the "My Watch" tab, scroll down to "General," click on "Cellular," and select "Set Up Cellular." Follow the prompts to activate a new plan or NumberSync |
| IMEI/EID number | If you're bringing your own Apple Watch, enter its IMEI/EID number, which can be found in the Apple Watch app on your iPhone under "General" > "About" |
| Family Setup | Each watch has its own phone number, voicemail, messages, and contacts. Calls made to a family member's watch won't ring the paired iPhone, and vice versa |
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What You'll Learn

Check plan eligibility
To check if your AT&T plan is eligible for adding an Apple Watch, you can log into your account online or call customer service. Not all AT&T plans support adding a smartwatch, so it's important to verify before attempting to add a device.
If you are an existing customer, log into your account on the AT&T website or app. Once logged in, look for the option to "Add a device." This option is usually found on the homepage or in your account settings.
If you are unable to find the "Add a device" option, you may need to call AT&T's customer support. Explain that you want to add an Apple Watch to your existing plan and ask if your plan is eligible. You may need to provide your account information and the model of your Apple Watch.
It's worth noting that some sources suggest that only certain AT&T plans are eligible to add an Apple Watch, specifically the AT&T Unlimited Elite, Unlimited Extra, and Unlimited Starter plans. However, some users have reported having a cellular Apple Watch on AT&T without an unlimited plan.
Additionally, if you are replacing a broken AT&T Apple Watch with a new one, you will need to call AT&T's customer support to update your Apple Watch EID on their servers.
Before proceeding, ensure that your Apple Watch is the cellular model (GPS + Cellular) as the GPS-only version is not compatible with a cellular plan. Also, make sure that your iPhone and Apple Watch are running the latest iOS and watchOS versions to avoid any compatibility issues.
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Update software
To update your Apple Watch software, you can either wait for a notification from Apple Watch notifying you of an update, or you can manually update it.
If you want to wait for a notification, simply tap "Update Tonight" when you receive the notification, then go to your iPhone to confirm that you want to update overnight. Leave your Apple Watch and iPhone charging overnight so the update can complete.
To manually update your Apple Watch, follow these steps:
- Open the Apple Watch app on your iPhone.
- Tap the "My Watch" tab.
- Tap "General".
- Tap "Software Update".
- Download the update. If asked, enter your iPhone or Apple Watch passcode.
- Wait for the progress wheel to appear on your Apple Watch. This could take several minutes to an hour, so it's recommended to leave your device charging during the update.
- Once the update is complete, your Apple Watch will restart on its own.
If your Apple Watch has watchOS 6 or later, you can install updates without your iPhone:
- Make sure your watch is connected to Wi-Fi.
- Open the Settings app on your watch.
- Tap "General".
- Tap "Software Update".
- Tap "Install" if an update is available, then follow the onscreen instructions.
- Leave your watch on its charger during the update and do not restart it manually. The watch will restart automatically once the update is complete.
If you see a "Cannot Install Update" error or a notification saying you need more available storage, you may need to remove any beta software installed on your devices. To do this:
- Open the Apple Watch app on your iPhone and tap the "My Watch" tab.
- Go to "General" > "Profiles" and tap the beta profile you want to remove.
- Tap "Delete Profile" and enter your iPhone passcode if requested.
- Open the Settings app on your iPhone and tap "General" > "Profiles & Device Management".
- Tap the beta profile you want to remove and tap "Delete Profile" again. Enter your passcode if requested.
- Restart both your iPhone and Apple Watch and check for the update again.
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Sign in to your account
Signing in to your account is a straightforward process, but there are a few key steps to keep in mind, especially when it comes to adding an Apple Watch to an existing AT&T plan. Here's a detailed guide to ensure a smooth sign-in process:
To begin, locate the official AT&T website and navigate to the login page. This is typically accessible via a "Sign In" or "Login" button on the homepage. Once you've reached the login page, you'll be prompted to enter your credentials. Provide your username or email address associated with your AT&T account. Ensure that you enter this information accurately to avoid any issues.
After entering your username or email, you'll need to input your password. Password fields usually hide the characters for privacy, so take care to type your password correctly. Some websites offer a "show password" option to help you verify. If you've forgotten your password, don't worry. Most websites provide a "Forgot Password?" link that allows you to reset it through a series of security questions or a linked email address.
In the case of adding an Apple Watch to your existing AT&T plan, you may be required to sign in to both your Apple ID account and your AT&T account. Ensure that you have the necessary credentials for both accounts before proceeding. This process typically involves registering your Apple Watch through the Apple Watch app on your iPhone, which is then followed by signing in to your AT&T account to update your plan.
Two-factor authentication (2FA) adds an extra layer of security to your account. If you've enabled 2FA, you'll need to enter a unique code sent to your mobile device or email address after providing your password. This step enhances the security of your account, ensuring that only authorized users can access it. Keep your device handy to promptly enter the code when requested.
Once you've entered your credentials and any necessary security codes, you can complete the sign-in process by clicking or tapping the "Sign In" or "Login" button. You should now have access to your account and be able to manage your AT&T plan, including adding your Apple Watch to it. Remember to keep your login information secure and update your password regularly to maintain the safety of your account.
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Add a device
If you want to add an Apple Watch as a device to your existing AT&T plan, there are a few things you should know and some steps you can follow. Firstly, not all AT&T plans support adding a smartwatch, so you should log into your account online or call customer service to verify that your plan is eligible.
If your plan is eligible, you can follow these steps:
Step 1:
Make sure your iPhone and Apple Watch are running the latest iOS and watchOS versions. Outdated software can sometimes cause compatibility issues.
Step 2:
Sign in to your AT&T account. If you don't have an account, you'll need to create one.
Step 3:
Once you're logged in, look for the option to "Add a device." This option is usually found on the homepage or in your account settings.
Step 4:
You'll then need to decide if you're bringing your own Apple Watch or buying a new one from AT&T. If you're bringing your own, you'll need to enter your watch's IMEI number, which can be found in the Apple Watch app on your iPhone under "General" > "About".
Step 5:
Follow the prompts to add the device to your current plan. You may need to select a new plan or data plan if your current one is not compatible.
Step 6:
If you're activating NumberSync on an existing watch, make sure it's not still linked to a different phone number or carrier.
Step 7:
If you're replacing an AT&T Apple Watch with cellular, you may need to call AT&T’s customer support and provide them with your new Apple Watch EID so they can update it on their servers.
Step 8:
Finally, follow any prompts or instructions from AT&T to complete the activation of your Apple Watch.
Please note that these steps may not cover all possible scenarios, and there may be additional steps or requirements specific to your situation.
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Set up cellular
To set up cellular on your Apple Watch, you must first ensure that your iPhone has Bluetooth turned on and is connected to a Wi-Fi or cellular network. Additionally, make sure that your iPhone and Apple Watch are running on the latest software.
During the initial setup of your Apple Watch, look for the option to set up cellular and follow the on-screen instructions. You will also be asked to set up Apple Pay by adding a card. If you are setting up an Apple Watch for a family member, you can add it to your plan during this step, provided your cellular carrier supports it. If your carrier does not support it, you may be able to use an alternative carrier.
If you did not set up cellular during the initial setup, you can do so later by opening the Apple Watch app on your iPhone. Tap the "'My Watch' tab, then tap "Cellular". Follow the instructions for your carrier. You may need to contact your carrier for help.
If you are setting up cellular for a family member's Apple Watch, open the Apple Watch app on your iPhone. Tap "All Watches", then tap the name of the family member's Apple Watch, and tap "Done". Tap "Cellular", then "Set Up Cellular", and follow the instructions for your carrier.
Once your Apple Watch is connected to cellular, it will automatically switch to the most power-efficient wireless available, such as connecting to your iPhone when it is nearby, a Wi-Fi network, or a cellular network.
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Frequently asked questions
First, log in to your AT&T account. Then, look for the option to "Add a device". If you're bringing your own Apple Watch, you'll need to enter its IMEI number, which can be found in the Apple Watch app on your iPhone under "General" > "About". You may also need to activate NumberSync.
Not all AT&T plans support adding a smartwatch. Eligible plans include AT&T Unlimited Elite, AT&T Unlimited Extra, and AT&T Unlimited Starter. Log into your account online or call customer service to verify that your plan is eligible.
If you have an unlocked Apple Watch that you purchased from Apple and have been using without cellular activated, you will need to call AT&T customer support to update your Apple Watch EID.
Open the Watch app on your iPhone, select "General", then "Cellular", and lastly, "Set Up Cellular". Then, follow the prompts to set up NumberSync.
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