To activate a new physical SIM card, go to our mobile app or in “My account” (https://wsc.undo.be/).
Once you received your SIM card, you can click “ACTIVATE” and enter the SIM card number (13 digits) and click “Activate”.
Activation of a new mobile number or SIM SWAP is usually done within an hour and you can therefore use it immediately. If you have chosen for a number portability, the waiting time depends on your current operator. When your mobile number is transferred and active, you will receive an SMS and you will also see the frame with your number in green in your UNDO account.