Go to your device’s [Settings], then tap [Cellular].
Under the SIMs section, tap [Add eSIM] to start the setup process.
Select [Use QR Code] as the installation method.
At the bottom of the screen, tap [Enter Details Manually].
Retrieve the activation code from your eSIM voucher in My eSIM or from your email. Enter the required details, then tap [Next] on the upper-right corner.
Follow the on-screen instructions. The activation process may take a few minutes.
Once the setup is finished, tap the [Done] button at the bottom of the screen.
You can customize the name of your eSIM (e.g., label it SeaSIM), then tap [Continue].
Select [Primary] as your default line for making and receiving calls and messages.
Choose [Primary] as the default line for iMessage and FaceTime.
Select your eSIM (labeled SeaSIM) as the default line for cellular data. Make sure [Data Switching] is turned OFF.
