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Home  >   What's New   >   Apple Watch Series 3   >   Apple Watch Series 4 (GPS + Cellular) Setup and Support

A. Information about activation and plans

  • Apple Watch Series 3/4 GPS + Cellular
  • iPhone 6 or later running iOS 11.2.5 or later
  • csl cellular plan. See below for eligible plans.

How to activate cellular service on Apple Watch Series 3/4 GPS + Cellular
  • Good news - your iPhone and Apple Watch Series 3/4 GPS + Cellular will share the same phone number. So you won’t have to get or remember another phone number.
  • - Apple Watch Series 3/4 GPS + Cellular has an eSIM (embedded SIM) in it so there’s no need to get a SIM card or transfer the SIM from another device.
  • - When you pair your Apple Watch to your iPhone, you will be prompted to set up cellular service and guided through a few simple steps.
  • - Be sure to have your username/ID and password/code on hand.
  • - If you don’t see a plan during set up, contact us and we can help you find one that works for you.
  • - If you choose not to set up cellular service during the initial Apple Watch set up process, you can always go back later to the Apple Watch app on your iPhone and select Cellular under My Watch to sign up.

Wireless Network support
  • Apple Watch seamlessly connects to the cellular network whenever it’s not connected to a nearby iPhone or Wi-Fi access point.
Apple Watch Series 3/4 GPS + Cellular supports voice and data over LTE.
  • Roaming outside your provider network coverage area is not available for Apple Watch Series 3/4 GPS + Cellular even though your iPhone plan may support roaming. However, you will continue to be connected when your Apple Watch is in proximity of your iPhone or connected to Wi-Fi.
Learn more about Apple Watch at Visit for additional support.


B. csl Apple Watch with Cellular setup guide

1. What you need to get started with Apple Watch with Cellular?
  • - Compatible iPhone models includes iPhone 6 and newer models. Your iPhone needs to be on iOS (Version 11.2.5 or later). To check or download the latest software version on your iPhone, go to Settings > General > Software Update. You will also need the latest carrier settings. On your iPhone, tap Settings > General > About and follow the prompt to update to the latest carrier settings.
  • - Your Apple Watch Series 3 (GPS+Cellular) needs to be on WatchOS version 4.2.2 or later.
  • - An Eligible cellular service plan from csl.
  • - Your iPhone and Apple Watch must both use csl.

2. How to subscribe and activate the service? Set up mobile data on your Apple Watch with Cellular
  • Step 1a:
    From iPhone:
    • a) Open ‘Watch’ app and pair your Apple Watch first
    • b) Tap ‘My Watch’ from bottom left of ‘Watch’ app
    • c) Tap ‘Mobile Data’
    • d) Tap ‘Set Up Mobile Data’
  • Step 1b:
    • a) Tap ‘Select My Plan’
  • Step 2:
    • a) Type in password of your mobile number
    • b) Tap 'Login'
  • Step 3:
    • a) Select 'Free local connection'
    • b) Read and accept the 'Terms & Conditions'
    • c) Tap ‘Submit’
  • Step 4:
    • a) Wait for the 'Activation done' message
    • b) Tap 'OK' when finish
  • Step 5:
    • a) Return to the 'Watch' app
    • b) If you see 1O1O / csl icon next appears under ‘DATA PLAN’ then your Apple Watch is successfully connected.

3. How do I find out if my service plan is eligible to subscribe to the watch plan?
  • An eligible post-paid service plan on your iPhone that you want to use with your Apple Watch is required. Dial *163# with your iPhone. You will receive an SMS with eligibility information.

Apple Watch Series 3/4 GPS + Cellular (“Device”) cellular service (“Service”) Terms and Conditions
• To use the Service you must have an eligible csl / 1O1O mobile service plan (“Service Plan”), a Device, and a compatible iPhone which is iPhone 6 with iOS 11.2.5 or newer.
• Data usage of the Service will be deducted from the Service Plan of your iPhone.
• You can make or receive calls from the Device using the mobile number of your iPhone.
• You can only use the Service with one Device at a time. If you want to connect to another Device, you can connect your Device to the Service via “Watch” app on your iPhone. Alternatively, you can purchase an additional Service to use with the new Device on your iPhone.
• You can purchase up to a maximum of four (4) Services under the same mobile number. If you are subscribing to a Multi-User Service Plan (“MUP”) with 5 SIM cards (1 Primary SIM Card and 4 Secondary SIM Cards), you can totally purchase up to maximum of 11 “Service ”only under all your mobile numbers in your MUP.
• The Service does not support international roaming.
• If you terminate the Service Plan of your iPhone, you are required to terminate the Service of your Device by calling our customer service.
• The Service is subject to the Mobile Service Agreement of CSL Mobile Limited, please visit
• If there is any inconsistency between the Chinese and English versions of these terms and conditions, the English version shall prevail.

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