Please follow the steps below if your eSIM is not working:
– Make sure that the eSIM is active and unlocked with the PIN code in your phone’s settings (you can find the PIN code in the email with the QR code you received for installation).
– If you still have an (old) physical SIM card in your phone, it is best to remove it.
– It is also best to set the eSIM as the primary SIM. If you have multiple SIM cards/eSIMs in your phone, the UNDO eSIM might be a secondary number. You need to set it as the primary SIM so that your calls/SMS/surfing will be done with the UNDO eSIM.

After following the above steps, restart your device to establish a new network connection.
Do you still have no network coverage with your eSIM? Then order a SIM SWAP to install a new eSIM.