• By sending an SMS request
• By calling 1633 (+65 68201633^{^} when you are travelling overseas)

To De-activate: SMS <DEACTIVATE> to 2828 and SEND.
To Re-activate: SMS <ACTIVATE> to 2828 and SEND.

Disclaimers:

1. Missed Call Alerts will not be sent if the missed call was made from payphones, PABX (Hunting lines) or lines with Caller Number-Non-Display or if the network operator you are roaming on charges for receiving SMS.
2. Maximum of Missed Call Alerts per person per day is 20.
3. For phone switched off or not within network coverage range scenarios, Missed Call Alerts will capture up to 9 missed call numbers (sent within 3 SMS) for the first 24 hours your phone was switched off/out of coverage.
4. ^Prevailing roaming rates apply when requests are sent while overseas.