I don’t have any connection — what can I do?
First, check if you’ve switched roaming to ON in your phone settings. Next, check whether you have coverage. If you find yourself in an area with limited phone coverage or no coverage at all, it’s going to be difficult to access the internet. Try switching locations and make sure you have sufficient bars to connect to 3G or 4G/LTE.
Other topics
You should avoid doing so. The eSIM is associated with your data plan, and deleting the eSIM app will delete your phone’s data plan.