Press *77 to block callers who withhold their phone numbers. Anonymous callers will receive a message that you don't accept calls without Caller ID info. Press *87 to unblock these calls.
Anonymous Call Rejection: Dial *77 to turn on Anonymous Call Rejection on your landline and wait to hear the three beeps.
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.
To turn off caller ID, open Settings, tap Applications, and then tap Phone. Locate and tap More Settings. Tap Caller ID. And select Hide Number.
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.
From the Google Phone app, go to Settings > Blocked Numbers > Unknown. From the Samsung Phone app, go to Settings > Block Numbers > Block Calls from Unknown Numbers.
To activate Anonymous Call Rejection, dial *77. Two beeps tell you Anonymous Call Rejection is turned on. To deactivate Anonymous Call Rejection, dial *87.
The international telephone code +77 corresponds to the country of Kazakhstan.
Forward Calls Only When Busy or on Another Line
Use this feature to send calls to another phone when your phone is busy or when you don't answer after three or four rings: Dial *71 and the number you want to forward calls to.
The national Do Not Call list protects landline and wireless phone numbers. You can register your numbers on the national Do Not Call list at no cost by calling 1-888-382-1222 (voice) or 1-866-290-4236 (TTY).
Getting a lot of unwanted calls would mean your number has been sold to a scammer group. Once your number is sold, it's used by all the scammers who have access to it. They try to defraud you in multiple ways by posing as professionals. Some might pretend to be from insurance agencies.
“The simplest way to tell if you have been blocked by an Android user is to call,” Lavelle says. Just like with an iPhone, listen for it to be diverted to voicemail or play you a pre-recorded message.
*777# is Glo's USSD short code which enables customers to recharge their Glo lines from their bank accounts.
*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.
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.
*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. If you want to re-enable caller ID, just add the code again.
Temporary caller ID blocking
To block on a call-by-call basis: on your home phone, dial 1831, then the number you're calling.
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. If prompted, press 3 to turn the feature on.