4G/3G BIG Bay Area 365-Day Prepaid Data SIM Card
4G/3G BIG Bay Area 365-Day Prepaid Data SIM Card
Price $288 Online Price $216
4G/3G BIG Bay Area 365-Day Prepaid Data SIM Card
  • Include 365-day 8GB Mainland China, Hong Kong and Macau Shared 4G/3G Data Usage
  • Registration not required. For your instant usage upon purchase.
  • Tethering is supported
  • Service is valid from the next day upon activation to the 365th day 23:59 (Hong Kong time)


Notice: Effective from 31 Oct 2019, the face value of Big Bay Area 365-day Data Prepaid SIM Card revises from $488 to $288.

Starter Pack
Face Value Suggested Retail Price Validity Period
$288 $2881 Service is valid from the next day upon activation to the 365th day 23:59 (Hong Kong time)2
  1. 8GB mobile data will be effective upon SIM activation. $288 stored value will be deducted accordingly
  2. Subject to the expiry date as printed on the SIM Cardholder, mobile data service is valid from the next day upon activation to the 365th day 23:59 (Hong Kong time).


Refill Amount and Validity Period

All refill methods entitle you to the corresponding extra stored value and validity period:

Recharge Amount
(per single recharge transaction)3
Extra Refill Bonus Validity Period4,5
Applicable to refill via CMHK Web and MyLink Mobile App within promotional period* Other Refill Methods6
$10 - $49 ----- ----- 30 days
$50 - $99 10% plus $5 10% 180 days
$100 - $199 10% plus $20
$200 - $299 20% plus $30 20% plus $10 180 days
$300 or above

30% plus $30

30% plus $10 180 days
* Promotional period valid until 31 December 2020.
  1. The minimum refill amount via PPS is $30.
  2. Every time your Prepaid SIM Card is refilled, the stored value validity period will be automatically extended starting from the date of refill. If the original validity period is longer, then the original validity period will prevail.
  3. Refill under $50 via service plan account will extend the stored value validity period to 63 days.
  4. Get extra $30 refill bonus upon refilling by $180 Electronic Refill Voucher. (The above 10% extra refill bonus offer does not apply in conjunction.)


Services & Charges
Services Service region Total Usage Charges
4G/3G Data Services Mainland China & Macau & Hong Kong Total Data Usage:8GB $288 stored value will be deducted upon SIM activation.

Big Bay Area Data Services7,8,9,10,11,12

Total Data Usage Validity Designated Operator Charges Subscription Method
8GB 365 days

Mainland China: CMCC

Macau: CTM


$288 stored value will be deducted upon SIM activation.


If the voice call pack is used up and data package expired, IDD, roaming and SMS service will be charged on below standard
Service Charges
Local Airtime Charge 24-hr Flat Rate: $0.1/min

IDD Call Tariff

  • Mainland China
  • Mongolia
  • Macau
  • $1.8/min + local$0.1/min
  • $1.8/min + local$0.1/min
  • $8.85/min + local$0.1/min (for different telephone number)
  • $19.9/min +local$0.1/min

Roaming Service

  • Mainland China



  • Macau


  • Incoming Calls: $1.9/min
  • Calls to HK: $1.9/min
  • Local calls (within the same zone: $1.9/min
  • Macau & Mongolia: $15/min


  • Incoming Calls: $3.9/min
  • Calls to HK: $3.9/min
  • Local calls (within the same zone): $3.9/min
  • Mainland China: $6/min
  • Mongolia: $20/min
Short Message Service Charges
  • Local Intra-network SMS
  • Local Inter-network SMS
  • International SMS
  • To Mainland China
  • To Macau
  • $0.1/SMS
  • $0.7/SMS

  • $0.5/SMS
  • $4.8/SMS


  1. Mobile data service is only accessible in Mainland China, Macau and Hong Kong, but not in other areas.
  2. Designated operators(Mainland China: CMCC; Macau: CTM; Hong Kong: CMHK). CMHK reserves its absolute right to change the operator at any time without prior notice to the Customer.
  3. Tethering is supported.
  4. Actual data transmission speed may vary due to many factors, including but not limited to: network traffic conditions, handset models, handset settings (both hardware and software), uploaded/downloaded content and other external factors, etc.
  5. When customer is located out of 4G coverage in HK or designated country/region, CMHK/designated operators will provide service via 3G/2G EDGE network within 3G/2G network coverage.
  6. Only mobile data, voice and SMS are supported, neither value-added services.
  7. Subscription of “Big Bay Area Data Package” will be re-counted data, airtime and SMS service immediately.
  8. IDD call charges will apply once a call is answered (even if the call is answered by any automatic answering systems including announcement, tone machine, etc). In some circumstances, IDD call charges may still apply to the ringing time due to special call routing design of third party service providers in the event if a call is not answered.
  9. Please check if applicable handset models are used to receive the content, and if the recipient's network is compatible. Otherwise customer could be charged even if the transmission is unsuccessful.
  10. When call minutes accumulated up to the available usage, thereafter local airtime charge and IDD Call Tariff will be calculated on a pay-as-you-go basis.



Distribution Channels

Prepaid SIM Card is available in MyLink, CMHK Online Shop, CMHK Shops, and Customer Centre to purchase Prepaid SIM Card.

For details locations, please contact our 24-hour Customer Care Hotline 29458888.

Handset Setting (Mobile Data)

Please click here and refer to the related handset APN setting for mobile data service.

Terms & Conditions
  1. The use of individual service shall be subject to such terms and conditions as stated on the relevant Prepaid SIM Card starter pack or on the relevant user guide.
  2. Once sold, this Prepaid SIM Card is non-refundable and non-returnable.
  3. This Prepaid SIM Card should be activated before the stipulated expiry date, otherwise it will be invalid automatically.
  4. Where this Prepaid SIM Card is expired, or where service has been terminated due to whatever reasons, the remaining data usage shall be non-refundable and non-transferable.
  5. CMHK will not be liable for any damages, however arising, of this Prepaid SIM Card or responsible for repairing and making good therefor.
  6. The mobile number of this Prepaid SIM Card is assigned randomly and Customer cannot return, choose or request to change to other mobile numbers. Customer will not be able to keep the allocated mobile number once this Prepaid SIM Card has expired, or where its service has been terminated due to whatever reasons.
  7. Calculation of data usage duration and volume is based on the network report of CMHK. In case of dispute, the records of CMHK are conclusive and binding. All calculations are subject to such prevailing rates or tariff as imposed by CMHK from time to time.
  8. CMHK is entitled at their full discretion to temporarily suspend any or all of the Services without notice to the Customer for the purpose of preventing any improper or abnormal use of CMHK's network or resources, fraudulent or deceptive acts until CMHK is satisfied that the Customer has ceased such acts or the relevant investigation has been completed. CMHK may assess abnormal usage based on comparisons to the usage patterns and levels of CMHK’s other customers, and/or based on whether such usage level is considered to have affected our other customers' ability to optimally use the same network or service.
  9. CMHK reserves its absolute right to change the terms and conditions relating to the use of this Prepaid SIM Card including but not limited to the data usage rate at any time without prior notice to or consent from the Customer.
  10. The above information and rates are subject to change without prior notice.
  11. Any change or amendment will be announced on CMHK website.
  12. For the details of the Terms and Conditions, please refer to http://www.hk.chinamobile.com/en/corporate_information/Customer_Service/contract_terms_conditions/customer-support-t-n-c.html.