Enjoy competitive rates to all destinations at all times with our 1638 IDD service. You may use fixed-lines, fax machines or 1638 IDD Service Number to make IDD calls.
Please select a destination to get the country code, area codes and 1638 IDD charges.
FOLLOW SMARTONE ON WECHAT NOW
Save QR code
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