Anonymous Call Rejection (*77) stops calls from people that use a blocking feature to keep their name or number from being displayed.
You can turn off this feature by dialing *87. Note: In some jurisdictions, dialing *77 on your mobile phone may connect you with law enforcement.
Most require an extra monthly fee to activate the caller ID service, but network-level blocking is free of charge across all the carriers. AT&T subscribers can use a free iOS and Android app called AT&T Call Protect. It has automatic fraud blocking and suspected spam warnings.
To deactivate, dial *87. Block your name and number from appearing on caller ID. Outgoing calls will be displayed as Private, Anonymous or Unavailable.
To block caller ID for an individual call, dial 1831 (or #31# from a mobile) then the number you are calling. Generally, this will make sure the person you are calling will not see your number.
You can uncover an unknown caller ID by using the *69 feature code, third-party apps, or contacting your phone service provider. Unknown callers could be hiding their identity to try to scam you, so it's important to unmask them before you fall victim.
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.
*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.
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. That's it, nothing more or less.
To activate Anonymous Call Reject, dial * 77. To deactivate Anonymous Call Reject, dial * 87.
A lot of people have pressed *77 from their cell phones thinking that it can stop unwanted calls, but that's not the case. Pressing *77 won't stop anonymous calls on your cell phone.
The *67 code blocks the caller's identification, making it appear “unknown” or “private” when dialing out. To call someone anonymously using *67, you can: Pick up the receiver. Dial *67.
Call return (*69) automatically dials your last incoming call, whether the call was answered, unanswered or busy. Call within 30 minutes, during which you can still make and receive calls. To deactivate while waiting for the party you are trying to reach to become available, dial *89.
Call Block, otherwise known as Call Screening, is a feature that allows you to block calls from up to 10 phone numbers within your local calling area for a low monthly rate. Turn on: Press *60.
When you enter *#0*# into the phone's dialer, the device enters service mode and brings up a diagnostics menu. From this screen, you can view and run multiple diagnostics to test device hardware like buttons, sensors, and cameras.
Yes, you can withhold your number to make anonymous calls on a per call basis by dialing 141 before the number you want to call. See more information above under anonymous calls.
Code to check if phone is tapped: *#21# Code to show unknown connections and tracking (for Android): *#*#4636#*#* or *#*#197328640#*#*
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.
*67 - Caller ID Block: Hides your phone number on Caller ID systems. *69 - Call Return: Redials the last number that called you. *70 - Call Waiting: Places your call on hold so you can answer another. *72 - Call Forwarding: Forward your call to another phone number.
Here's how to activate Call Trace: Hang up the phone after receiving a harassing call. Pick up the phone and press *57 (touch tone) or 1157 (rotary). You'll hear a confirmation tone and message will be heard If the trace is successful.
Dialing *69 will automatically call back the last number that called you. Keep in mind that this feature may not be available on all cell phone networks, and it may not work for calls that are blocked or private.
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.