how to hide your number when calling someone iphone
1 iPhone-Open the Settings app, tap Phone, tap Show My Caller ID, and then toggle the slider to ON. 2  Android 4.0 and earlier-Open the Settings app, tap Call, tap Additional settings, tap Caller ID, and then tap Hide number.teps. 1. Use a caller ID blocking prefix. In many countries, you can enter a code before you dial a number and your phone number will be blocked from appearing on the recipient's caller ID. The code varies depending on your country and your service provider, and it is not possible to block in all countries.