There are a few different ways to make your phone number appear as a private or unknown number when you make a call. Here are some methods you can try:
Use your phone's caller ID blocking feature: Many phones have a feature that allows you to block your caller ID from being displayed to the person you're calling. The method for enabling this feature may vary depending on your phone model, but typically you can find it in your phone's settings or in the call settings menu.
Use a prefix before dialing the number: In some countries, you can dial a prefix before the phone number you're calling to hide your caller ID. For example, in the United States, you can dial *67 before the number to make your call appear as a private number.
Use a third-party app: There are also third-party apps available that can help you make anonymous or private calls. These apps typically use their own network or infrastructure to make the call, which can help conceal your phone number. However, be sure to read reviews and do research on any app you use to ensure it's reputable and safe.
It's worth noting that some people may not answer calls from private or unknown numbers, so you may want to consider whether it's necessary to hide your number before making a call. Additionally, some countries have laws and regulations around anonymous calling, so make sure to check local laws before using any of these methods.