Many smartphones have the option to hide your number when making a phone call built in, making it easier to keep your number ...

Then, like the grand finale of a magic show, toggle off ' Show My Caller ID.' Poof. Your number is now invisible to all you call until you flip that switch back on.

For iPhones, go to Settings > Phone > Show My Caller ID and toggle it off. If you have a VOIP line, you can turn off the outbound caller ID in your phone management software.

To block caller ID for an individual call, dial #31# from a mobile, then the number you want to call. Generally, this will ensure that the person you call will not see your number.

Open your call settings: Navigate to your call settings or caller ID settings. Find the relevant setting: Search for the caller ID option, which may show up as 'Hide number' or 'Caller ID settings'.