In some situations (eg. if a teacher is working remotely and needs to call a parent mobile) you may need to make a mobile to mobile call that is anonymous.

Here’s how:

  1. For anonymous calls from mobiles use the prefix #31# before the phone number.
  2. From a home phone, dial 1831 then the number you’re calling.

This keeps your mobile number anonymous so is super handy!

Bonus – make every call anonymous:

iPhone hide caller ID


This animation to the left shows how to do this on an iPhone.

Click here to learn how to do this for Android.

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