Apple Watch One Number Service: Stay Connected Without Your iPhone
The One Number Service** enables your cellular Apple Watch to share the number and allowances of your iPhone's mobile service plan, allowing you to stay connected to the 1O1O network for calls, messages, and data even when your iPhone is out of range.
One Number Service enables your Apple Watch to stay connected to 1O1O’s network without Wi-Fi or having your iPhone with you.
Supports 5G Network to Enhance Speed and Performance #
The 5G network operates independently without relying on 4G infrastructure, fully unlocking the potential of 5G technology to deliver faster data speeds and lower latency.
Convenience of using just one number
Use the same phone number, so you won’t need to get or remember another phone number.
Share allowances
Use your mobile plan’s entitlement. Allow your Apple Watch to use your data and voice-minute allowances.
Flexibility of location
Leave your phone at home because you can stay connected without it
Note:
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.
Roaming outside your provider network coverage area is not available for Apple Watch (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.
#Requires compatible specified devices and subscription to designated services
One Number Service Charge
| Charge Type | Service charge | |
|---|---|---|
| 5G network | 4G LTE network | |
| Month-to-month rate |
Promo Price: HK$18/month*
(Regular HK$28/month) |
HK$18/month |
| Monthly rate with commitment period^ |
Promo Price: HK$15/month
~*
(Regular HK$25/month) |
HK$15/month ~ |
* The Promotion offer is valid from 19 September 2025 to 31 December 2026.
^ Customers is required to subscribe to 24-month or longer commitment period.
~ HK$15 per month Service is applicable only to customers who subscribe to the Service for a commitment period of 24/36 months (the "Commitment Period"). The monthly fee of the Service for the first 6 months would be waived if customers port-in the numbers to csl and 1O1O for Service Plan subscription. After the Commitment Period, the 5G service will be automatically renewed on a monthly basis at HK$28 per month, while the 4G LTE service will be automatically renewed on a monthly basis at HK$18 per month.
Apple Watch eSIM Subscription Flow
STEP 1
From iPhone:
- Open 'Watch' app to pair your Apple Watch
- Tap 'My Watch' from bottom left of 'Watch' app
- Tap 'Mobile Data'
- Tap 'Set Up Mobile Data'
- Tap 'Select My Plan'
STEP 2
- Type in password of your mobile number
- Tap 'Login'
STEP 3
- Type in one-time password
- Tap 'Submit'
STEP 4
- Select Your Device
- 5G-compatible or 4G LTE-compatible Apple Watch - Tap 'Next'
STEP 5
- Select 'One Number Service'
- local voice and data shared with mobile service plan - Read and accept the 'Terms and conditions'
- Tap 'Submit'
STEP 6
- Wait for the 'Activation done' message
- Tap 'OK' when finish
STEP 7
- Return to the 'Watch' app
- If you see 1O1O / csl
icon next appears under
DATA PLAN then your Apple Watch is successfully connected.
Apple Watch eSIM訂購流程
步驟1
從iPhone:
- 打開 “Watch” 應用程序，以配對您的 Apple Watch
- 點擊“Watch”應用程序左下角的 “我的手錶”
- 點擊 “流動網絡”
- 點擊 “設定流動網絡”
- 點擊 “選擇我的服務”
步驟2
- 輸入您的手機號碼的密碼
- 點擊 “登入”
步驟3
- 輸入驗證碼
- 點擊“提交”
步驟4
- 選擇您的裝置
- 支援5G 或4G LTE的Apple Watch - 點擊“提交”
步驟5
- 選擇 “One Number服務”
- 與流動服務計劃共享本地語音及數據 - 閱讀並接受 “服務條款及細則”
- 點擊 “提交”
步驟6
- 等待 “啟動完成” 信息
- 完成後點擊 “確認”
步驟7
- 返回到 “Watch” 應用程序
- 如果您看到流動數據計劃下出現 1O1O / csl
圖標
這代表 Apple Watch 已成功連接。
Basic Requirements & FAQs
| Device | 5G Network | 4G LTE Network |
|---|---|---|
| iPhone | iPhone 11 or later and running on iOS 26 or newer | iPhone 6s or later and running on iOS 14 or newer |
| Apple Watch | Apple Watch Series 11 / SE 3 / Ultra 3 (GPS + Cellular) and running on **WatchOS 26 or newer** | Apple Watch Series (4th to 10th generation) / SE (1st and 2nd generation) / Ultra (1st and 2nd generation) (GPS + Cellular) and running on **WatchOS 7 or newer** |
Note: To check if your service plan is eligible, dial *163# using the iPhone that you want to use with your Apple Watch. You will receive an SMS with eligibility information.
When a customer starts the Apple Watch eSIM subscription process via Apple Watch, the system will check whether the customer has completed Real-name Registration. If not completed, the system will send the customer a text message through their mobile number. By clicking on the SMS link, the customer can submit his/her identity documents to complete Real-name Registration. Upon successful registration, he/she can subscribe to the Apple Watch eSIM immediately. If personal info needs updating before submitting Real-name Registration, review results will be sent by SMS or email within 3 working days.
Please note you need to enter a **one-time password** to verify your identity as part of the self-subscription flow. For any enquiries, simply call our 24-hour Customer Service Hotline on **2888 1010**.
If you have not completed Real-name Registration, please watch the following tutorial:
Yes. For switching from Apple Watch to Apple Watch, please go to the "Watch" app on your iPhone to update pairing.
Yes. If you have already registered for IDD service, you can make international calls using IDD service on your wearable device.
Yes, but with certain conditions. For details of Apple Watch International Roaming Service, please click here .
Yes. You can call "988" as usual via your wearable device to check your voicemail.
Each mobile number is eligible for up to 4 "One Number" subscriptions and only one paired wearable device is enabled for each "One Number" subscription at a time. If you need to switch to another wearable device, please WhatsApp us. For switching from Apple Watch to Apple Watch, please go to the "Watch" app on your iPhone to update pairing.
No. If you change to use another supported smartphone with the same mobile number, you just need to pair your new smartphone with your wearable device to continue enjoying "One Number".
When your smartphone is not nearby or when Bluetooth is turned off, your Apple Watch will connect to cellular network automatically. You can check the connection status and signal strength from Control Center or the Cellular complication that you can add to most watch faces. To open Control Center, simply by pressing the side button. If the cellular button on the top left of the screen has tuned green, it indicates that your Apple Watch is connected to cellular network successfully.
The Cellular button turns green when you have a connection. The green bars show the signal strength.
Service Terms and Conditions
- The Offer is valid from 19 September 2025 to 31 December 2026, both dates inclusive (the “Promotion Period”).
- In order to qualify for the Offer, you must subscribe to a designated 1O1O / csl / Club Sim mobile service plan (“Service Plan”), and use a 5G-compatible Apple Watch Series 11 / Apple Watch SE 3 / Apple Watch Ultra 3 (GPS + Cellular) running on WatchOS 26 or newer and use a compatible iPhone 11 or later models running on iOS 26 or newer.
- During the Promotion Period, customers can subscribe to the Service at a promotional price **HK$18 per month** (with no commitment period). This service is available through the Watch app on your iPhone, over the phone via our 24-hour customer service hotline, or in person at any 1O1O Center or csl shop with one of our sales representatives.
- After the Promotion Period, customers can continue to enjoy Apple Watch One Number Service (the “Service”) at the regular price of **HK$28 per month**. The Service is automatically renewed until it is cancelled. If you want to terminate the Service during Promotion Period, 7 days prior notice is required before the end of Promotion Period. If you decide to terminate the Service after the end of Promotion Period, 30 days prior notice is required.
- The Offer is subject to availability while stocks last.
- Unless otherwise stated, the Offer cannot be used in conjunction with any other promotional or discount offer, and are non-transferable or exchangeable for cash or other products.
- The Offer is subject to further terms and conditions. For details, please visit https://1010.com.hk/apple_watch#eSIM or https://www.hkcsl.com/en/apple-watch-lte-setup-and-support-5/.
- The General Terms and Conditions of CSL Mobile Limited (“CSL”) apply ( https://www.1010.com.hk/terms_and_conditions or https://www.hkcsl.com/en/service-terms-and-conditions/) to the relationship between CSL and you in respect of the mobile service.
- CSL reserves the right to vary or cancel the Offer and/or amend these Terms & Conditions at any time without notice.
- If there is any inconsistency between the Chinese and English versions of these terms and conditions, the English version shall prevail.
- In order to qualify for this Service, you must subscribe to a designated
1O1O / csl / Club Sim mobile service plan (“Service Plan”) and:
- For 4G LTE-compatible Apple Watches, you must use an Apple Watch Series (3rd to 10th generation) / Apple Watch SE (1st and 2nd generation) / Apple Watch Ultra (1st and 2nd generation) (GPS + Cellular) running on WatchOS 4.2.2 or newer, and use a compatible iPhone 6 or later models running on iOS 11.2.5 or newer.
- For 5G-compatible Apple Watches, you must use an Apple Watch Series 11 / Apple Watch SE 3 / Apple Watch Ultra 3 (GPS + Cellular) running on WatchOS 26 or newer and use a compatible iPhone 11 or later models running on iOS 26 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.
- Service fees & commitment period:
- For 4G LTE-compatible Apple Watches, **HK$15 per month** Service is applicable only to customers who subscribe to the Service for a commitment period of 24/36 months (the “Commitment Period”). The monthly fee of the Service for the first 6 months would be waived for new customers who port-in their numbers to csl, 1O1O and Club Sim upon Service Plan subscription. After the Commitment Period, the Service will be automatically renewed on a monthly basis at HK$18 per month or the latest prevailing price.
- For 5G-compatible Apple Watches, **HK$25 per month** Service is applicable only to customers who subscribe to the Service for a commitment period of 24/36 months (the “Commitment Period”). The monthly fee of the Service for the first 6 months would be waived for new customers who port-in their numbers to csl, 1O1O and Club Sim upon Service Plan subscription. After the Commitment Period, the Service will be automatically renewed on a monthly basis at HK$28 per month or the latest prevailing price.
- 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.
- For a 5G network connection, Apple Watches that support 5G are required to use the 5G data service. 5G local data service may not completely cover all locations within the service area, depending on performance of local 5G network. Local data service will automatically switch to 4G LTE, or other technologies, in locations not covered by a 5G network.
- You can apply for up to 10 device services for your primary MUP.
However, you are further subject to the maximum number of eSIM for each
category of service as set out below.
Service Maximum number of eSIM
you can apply by
categories of serviceApple Watch One Number Service;
Apple Watch International Roaming Service;
Other Wearables One Number Service4 Apple Watch Family Sharing Setup Service 5 iPad eSIM Data Sharing Service 5 - 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 https://www.1010.com.hk/terms_and_conditions or 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.
- In order to qualify for this service, you must subscribe to a designated csl / 1O1O mobile service plan ("Service Plan"), use an Apple Watch Series 3 or later running on watchOS 4.2.2 or newer, and use a compatible iPhone 6 or later running on 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.
- **HK$15 per month** Service is applicable only to customers who subscribe to the Service for a commitment period of 24/36 months (the "Commitment Period"). The monthly fee of the Service for the first 6 months would be waived if customers port-in the numbers to csl and 1O1O for Service Plan subscription. After the Commitment Period, the Service will be automatically renewed on a monthly basis at **HK$18 per month**.
- 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 apply for up to 10 device services for your primary MUP.
However, you are further subject to the maximum number of eSIM for each
category of service as set out below.
Service Maximum number of eSIM
you can apply by
categories of serviceApple Watch One Number Service;
Apple Watch International Roaming Service;
Other Wearables One Number Service4 Apple Watch Family Sharing Setup Service 5 iPad eSIM Data Sharing Service 5 - 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 https://www.1010.com.hk/en/terms_and_conditions.
- If there is any inconsistency between the Chinese and English versions of these terms and conditions, the English version shall prevail.