1. To make a call, use your Singapore mobile to dial the assigned 8-digit Call-Me-Back Access Number in Singapore (eg. +656XXXXXXX).
2. You will hear a ringing tone once. The call will be disconnected. Hang up and wait for ZONE to call you back.
3. Your Singapore mobile will ring back. Answer the call and dial the Country Code + Area Code + Telephone Number you wish to reach, followed by the ‘#’ (hex) key when prompted. Your call will be connected shortly.