Dialing *68 will disable the Caller ID for the next outbound / external call only. Selecting a line and dialing this feature code will result in a prompt on the phone display as well as an audible message: "Caller ID is BLOCKED for the next outbound call only."
*67 dialed by itself or before a phone number string will permanently turn on the Block Caller ID feature. *68 dialed by itself or before a phone number string will permanently turn off the Block Caller ID feature.
*70 - Call Waiting: Places your call on hold so you can answer another. *72 - Call Forwarding: Forward your call to another phone number. *77 - Anonymous Call Rejection: Blocks calls from private callers.
To program your Speed Calling 8 list, dial *74. Listen for the dialtone, then dial the one-digit number (2 through 9) you would like to use to dial a frequently called number. Then, dial the entire number you wish to designate for that code, followed by #. Remember to dial 1 and the area code for long-distance numbers.
You might be wondering how this magic trick works. It's surprisingly simple: The moment you dial *67, your phone sends a signal to your provider requesting a caller ID block. From that point forward, your outgoing calls become shrouded in mystery, appearing as "private" or a "blocked number" on the recipient's end.
Caller ID and *57 call tracing services -- the primary consumer interfaces with electronic identifiers -- make it tough to hide from the heat these days. Dialing *67 may cloak your call from other Caller ID-equipped phones, but not from your carrier or the authorities.
This Vertical Service Code, *82, enables calling line identification regardless of subscriber preference, dialed to unblock withheld numbers (private callers) in the U.S. on a per-call basis.
*31# (Disable Caller ID)
If you want to keep your privacy and prevent others from knowing when you call them, you can disable caller ID by using this code.
Anonymous Call Rejection (*77) stops calls from people that use a blocking feature to keep their name or number from being displayed. When Anonymous Call Rejection is turned on, callers will hear a message telling them to hang up, turn off the blocking feature, and call again.
Block calls from your phone
Press *80 to turn call blocking off. Press *60 to turn call blocking back on.
*57 is a call tracing service offered by most phone companies. It allows you to easily trace calls made to your phone number. Essentially, *57 records the calling number and other identifying information such as the date and time of the call.
*60: Call Screening
This calling feature allows you to block up to 30 phone numbers. You can add the numbers you wish to block from your phone. You can also block the last number that called you, even if it's private.
Australia: *10# for Telstra services or *69 on Optus HFC Telephony network. This only allows one to return the last unanswered call, and can cost 35 cents per use.
Common “star codes”
*67 - Block phone number on Caller ID systems. *69 - Redial the last number that called you. *70 - Places your call on hold so you can answer another.
You have the option to block Caller ID either temporarily or permanently. To block your number from being displayed temporarily for a specific call: Enter *67.
Star 69 refers to "last-call return," the Calling Feature Vertical service code *69 keyed on a landline telephone set in order to return the call of the last one to ring (in Canada and the United States).
Other callers will hear a message that you are not accepting calls at this time. To activate, dial *64. Listen for an announcement to tell you whether the feature is currently on or off. The recorded voice will then tell you how many numbers are on your call acceptance list.
*97. Pick up a call for another user in the same group. Lift the telephone handset, press the speaker button, or the headset button.
The *#9900# code is a diagnostic mode code for Samsung mobile devices. It can be used to access a variety of system information and diagnostic tools, such as enabling/disabling fast dormancy, logging options, and system dump mode.
What does dialing *#21# actually do? When you dial *#21#, you are, in fact, activating a feature access code that quickly tells you the status of call forwarding for your phone. It's a quick way of seeing what, in the case of this particular 'setting interrogation code,' your call forwarding settings.
With the *#62# settings interrogation code, you can see if calls or texts are being forwarded to another number whenever you're unreachable. If the "Voice Call Forwarding," "Data Call Forwarding," and "SMS Call Forwarding" all say they're disabled, good.
The next time you receive a call from a number you wish to block, end the call and dial *97. The number will automatically be added to your Selective Call Rejection list. You can block up to 100 numbers.
When you do not want to be disturbed by incoming calls, you can activate the “Do Not Disturb” feature. All calls will be directed to Voice Mail and you will not hear your phone ring. To activate Do Not Disturb, dial *78.
About Selective Call Forwarding (*63)
Selective Call Forwarding lets you program your office phone to direct incoming calls from specific phone numbers you have pre-selected to a different number - such as your cellular phone - when you're away from your office.