To deactivate, dial *87. Block your name and number from appearing on caller ID. Outgoing calls will be displayed as Private, Anonymous or Unavailable.
Dial *87# Caller ID. Display your Caller ID information when you make an outgoing call. Caller ID is turned on by default with Phone service.
While *67 is used to block your phone number from displaying on the recipient's caller ID during a call, *87 is used to forward incoming calls to a different number.
You can: 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.
iPhone code: *3370#
If you ever find yourself somewhere getting poor cellphone reception, type in this code to turn on “enhanced full rate” mode. EFR mode improves your cell reception, but your battery life might be compromised.
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.
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.
To block a number: Press #, dial the 10-digit number you want to add, and press # to confirm. To unblock a number: Press *, dial the 10-digit number you wish to remove, and press * to confirm. Enter *67 and then the number you want to block from seeing your caller ID info.
You can also use *82 to unblock your number in case your call gets rejected temporarily. Some providers and users will automatically block private numbers, so using this code will help you bypass this filter. Blocking your number can go a long way in stopping annoying robocalls.
*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.
How do I unblock Caller ID to a certain number? To deactivate Caller ID Blocking for a specific number: Enter *82.
Signs That Someone Has Remote Access to Your Phone
The battery drains quickly even when not in use. Higher data usage than usual. Noises in the background when you're on a phone call. You receive unusual messages, emails, or notifications.
Code to check if phone is tapped: *#21# Code to show unknown connections and tracking (for Android): *#*#4636#*#* or *#*#197328640#*#*
*66: Busy Call Return
The Busy Call Return service allows you to call a busy line over and over automatically for 30 minutes. When the line becomes free, your phone will notify you with a distinctive ring.
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."
Dialing this before a number basically hides their number from the person they're calling, and prevents anyone from calling them back. *69 allows you to find out who called your phone last… unless it was blocked with *67. You cannot *69 a blocked number.
Go to your Phone app and open the Keypad, enter the special code, "*67" and then input the phone number that you want to call and tap "Call" to start calling the one who blocked you. The special code is *67 in the US, *141 in UK and *1831 in Australia or New Zealand.
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.
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.
Block your name and number from appearing on caller ID. Outgoing calls will be displayed as Private, Anonymous or Unavailable. To activate, dial *65, then the number you wish to call. Your caller ID will be blocked on the current call only.
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.
Security of Android Smartphone codes : Code ## 002 # ~ Deactivates all forwarding. Code * # 21 # ~ To know whether message or call has been diverted or not.
Auto Redial is a service that dials a number that is busy for up to 30 minutes and alerts you with a distinctive ring when the line is no longer busy. To activate Auto Redial, press *66 (1166 from a rotary phone).