CAT International call forward
It is a call forward service that transfers an incoming local call into the foreign destination numbering. With this service, an oversea traveler can receive any incoming local calls without international mobile roaming subscription.

Service in details

CAT international call forward It is a service that forwards calls from mobile phone number in Thailand to another overseas SIM card number. Users can receive calls in other countries when their regular phone number is dialed in Thailand.


When you travel abroad, this international call forwarding allows you to have an overseas phone number without any notice of your phone number change. Besides, this service can be used with all mobile phone systems in over 232 countries around the world.


Importantly, this service helps save money more than the international roaming service. The CAT international call forwarding charges a minimum CAT 009-based fee of 2.50 baht per minute, helping save service users’ expenses.


How to use the service

Postpaid service

  1. You can apply and register the overseas SIM Card number for the international call forwarding service at any CAT customer service offices. If the overseas SIM Card is not available on the application date, you can register the number later at CAT Contact Center by;
    • Call to the CAT Contact Center at +66 (0) 2104 0403
    • Call to the CAT Contact Center via CAT Thailand direct (Free of charge service and available in some countries)
    • Send email to the CAT Contact Center at
  2. Before traveling, divert your local phone through Call Forward / Call Divert feature to the fixed line number assigned by CAT. *
  3. Change your SIM Card to the registered overseas SIM Card.
  4. When you arrive at the destination country, you can switch on your mobile phone for calling and receiving.


Remark : When arrive Thailand; please cancel your call diverting from mobile phone numbers to the CAT fixed line number immediately.


Prepaid service

  1. Subscribe at CAT telecom offices to get the fixed line number
  2. Forward all incoming calls to the fixed line number
  3. Visit to set up a new SIM card number (User manual)
  4. When arrived to your destination, insert the new SIM card to your mobile
  5. When return to Thailand, change your SIM card back to Thailand SIM card


How to set up Forward call

  • Dial **21*02-XXX-XXXX# + Call out (XXX-XXXX: Your fixed line number that received from CAT telecom) from your mobile
  • Dial ##21# + Call out to cancel Forward call


Charge rate

Postpaid service:

  • Monthly fee: 200 baht / overseas SIM Card number
  • Charge for change of call forwarding number (Overseas SIM Card Number) : 50 baht per time.


Prepaid service:

Subscribe / Refill (Baht)

Duration (Day)








Usage charge

  • Call forwarding fee from mobile phone numbers to the CAT fixed line number: based on service fees for domestic calls to the fixed line number (average fee at 1-3 baht per minute)
  • Call forwarding fee to overseas SIM Card number: based on CAT 009 service fees to mobile phones at the minimum rate of 2.50 baht per minute (CAT 009 rates for each destination are different). Please check the service fees at CAT 009 Rates


1. Fees for receiving calls from abroad, charged by SIM Card service providers of those countries: expenses incurred in some countries.
2. Charges for international outgoing calls or domestic calls are calculated according to the
service fees of overseas SIM Card.


Refill channels

The followings are the money refilling channels for the CAT International Call Forward Service:

1. CAT Internet Service Centers

2. Via a credit card

3. Via a bank account


เว็บไซต์นี้ใช้คุกกี้ เพื่อสร้างประสบการณ์นำเสนอคอนเทนต์ที่ดีให้กับท่าน รวมถึงเพื่อจัดการข้อมูลส่วนบุคคลเพื่อให้ท่านได้รับประสบการณ์ที่ดีบนบริการของเว็บไซต์เรา หากท่านใช้บริการเว็บไซต์นี้ต่อไปโดยไม่มีการปรับตั้งค่าใดๆ นั่นเป็นการแสดงว่าท่านอนุญาตยินยอมที่จะรับคุกกี้บนเว็บไซต์และนโยบายสิทธิส่วนบุคคลของเรา