What to do:
Purchased in shop? Your eSIM will activate 30 minutes after you receive it via email. After lost of network on your old SIM, make sure your eSIM is turned on in device settings. Restart your device after.
Otherwise, activate your line via My Singtel app. Refer to your eSIM email for more details. Make sure your eSIM is turned on in device settings. Restart your device after.