Turn on “Caller ID Block” in your phone’s settings
Enable “Hide Number” / “Block Caller ID” for outgoing calls
Use a carrier-specific code (e.g., dial the code before the number)
Set your line to “Block Caller ID” with your mobile carrier
Use a third-party calling app that supports private caller ID
Use a different calling line/number for the call
Ask the recipient to block your number after the call if appropriate
If using a landline, enable “Caller ID Blocking” in the phone or through the carrier
For specific calls, use the per-call block feature (if available) in the dialer menu