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What is an eSIM? Whay an eSIM? eSIM installation steps for Samsung Galaxy Z Flip eSIM installation steps for Samsung Galaxy Z Flip eSIM installation steps for Microsoft Surface Pro X eSIM installation steps for Microsoft Surface Pro X eSIM installation steps for iPhone SE (2nd generation or later model)
If you have not yet completed the real-name registration, please visit any csl shop in person to complete the registration before subscribing to a One-Number Service eSIM.(csl shops: https://www.hkcsl.com/en/shop/) Please note you need to enter a one-time password to verify your identity as part of the self-subscription flow.

eSIM supporting models
       
  iPhone Android mobile  
  iPhone XS Samsung Z Flip  
  iPhone SE (2nd generation or later model) Huawei P40  
  iPhone 12 mini (HK version) Huawei P40 Pro  
  iPhone 13 mini (HK version) Huawei Mate 40 Pro 5G  
    MOTOROLA RAZR 5G  
    HONOR Magic 4 Pro  
       
  iPad Android Wearable Device  
  iPad Pro 12.9-inch (3rd generation or later model) Galaxy Watch (LTE)  
  iPad Pro 11-inch (1st generation or later model) Galaxy Watch Active2 (LTE)  
  iPad Air (3rd generation or later model) Huawei Watch 2 (eSim)  
  iPad (7th generation or later model) Huawei Watch 3   
  iPad mini (5th generation or later model) Huawei Watch 3 Pro  
    Samsung Galaxy Watch 3 45mm (LTE)
Samsung Galaxy Watch4 Classic 46mm (LTE)
Samsung Galaxy Watch4 44mm (LTE)
Samsung Galaxy Watch5 40mm/44mm (LTE)
Samsung Galaxy Watch5 Pro 45mm (LTE)
 
       
  Apple Watch Windows Device  
  Apple Watch (GPS + Cellular) (Series 3 or later model) Microsoft Surface Pro X  
  Apple Watch SE Microsoft Surface Go 2 LTE
Microsoft Surface Go 3 Intel® Core i3 128 LTE
 
 

* As of Sep 2022 in Hong Kong
   
FAQ FAQ
More enquiries at csl shop
Other Wearables One Number Service (the Service) Terms & Conditions
To use the Service you must have an eligible csl / 1O1O mobile service plan (“Service Plan”), a compatible “Device”, and a compatible Android 5.0 or newer mobile phone with 1.5GB RAM or above and iPhone which is iPhone 5 with iOS 9.0 or newer.
Data usage of the Service will be deducted from the Service Plan of your Service Plan.
You can make or receive calls from the Device using the mobile number of your Service Plan.
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 “1O1O” / “csl” app on your mobile phone. Alternatively, you can purchase an additional Service to use with the new Device on your mobile phone.
You can purchase up to a maximum of one Service under the same mobile number.
The Service does not support international roaming.
If you terminate the Service Plan of your mobile phone, 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 www.hkcsl.com/en/mobile-service-agreement-consumer-customers/.
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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