First, check if the Ubigi eSIM profile is installed on your iPhone
Go to: settings > mobile data > under data plans: installed eSIM profile will appear as “Secondary” (or the name you renamed it).
If your eSIM profile is already installed, go to step 2.
If no eSIM is installed yet, go to Get started and follow instructions for your device.
If you deleted your eSIM profil, please follow instructions on this link.