Why does my Samsung Android phone list my phone number as 'Unknown' in its settings?

This error commonly occurs when you transfer the number you were using on your old phone over to your current phone.

Your Samsung phone reads the phone number originally assigned to the SIM card and if you are no longer using that number (such as when you've ported over your old number to use with the new SIM card) your phone will no longer know what number your are using. Your phone in this case will list your current number as 'unknown' rather than incorrectly present the number originally assigned to the SIM card.

This information cannot currently be amended due to how the Android operating system registers a number to the handset upon first use. The issue may be resolved in a future Android software update, but until then rest assured that it has no effect on your device's functionality.

As a workaround you could create a profile in your contacts list that lists your phone's number (check with your network operator if you don't know your number). To do so follow these steps:

Now you'll have a record of your phone's number within easy reach despite it not being listed in the settings.