- SmarTone 5G
- Service Plans & Prepaid Cards
- Phones & Products
- 5G Broadband & Home Service
- International Roaming
- Privileges & Support
Mobile Services
Value-Added Services
4.5G Service Plans
Free 1GB/month Mainland & Macau Roaming Data
Offer is only applicable to customer who subscribes $98 & $120 4.5G Service Plans
1638 IDD
1638 IDD Service Number
If you have registered 1638 IDD, you will receive a 1638 IDD Service Number enabling you to make IDD calls from any touch tone phone, including unregistered ones, giving greater flexibility and convenience with economical IDD rates.
Simply follow the steps below to call:
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(Mobile Phone) or 
(Fixed Line/ Fax)
Note to first-time users:
Your 1638 IDD Service Number must be used with a PIN number. If you have not yet set up a PIN for your 1638 IDD service, please call our Account Management Hotline at 2260 8000 using any of your pre-registered phone numbers to set your PIN and activate the "Account Password" function.
Follow
SmarTone on WeChat Now
- Launch your WeChat app
- Tap the “+” button in the top right-hand corner, and tap “Scan QR Code”
- Scan the QR code and view our official account right away