1. Lift the handset and wait for the dial tone.
2. Key * #
3. The phone exchange will dial the phone number of the person that last called you. Wait for the call to be connected.

Please Note:

• You can return an incoming call using Call Back whether you answered the phone or not. This includes calls that came in on Call Waiting.
• When you return a call from a PBX extension, you will reach the switchboard operator and not the extension number that called you.
• The memory will be erased once * # is keyed in.
• Call Back cannot be used if the last call from a public phone, a SingTel operator or someone calling from overseas. in such a case, there will be an NU (Number Unobtainable) tone.
• If your phone is locked against local calls, Call Back cannot be activated to call back the last incoming call. You will hear the announcement: "Sorry, you have not entered the correct PIN." you must unlock your phone before you can activate Call Back.

1. Lift the handset and wait for the dial tone.
2. Key * *
3. The phone exchange will redial the last outgoing number dialled on your phone line. Wait for the call to be connected.

Please Note:

• Call Back cannot be used to redial special service phone numbers (e.g. 1711, 999, 100 etc.).