If you have an eSIM installed on your phone and you are in port and can take advantage of the data from the eSIM, you go into your phone settings and turn on the HotSpot feature.  Then on your iPad or laptop, you search as you would for WiFi connection and find your HotSpot and connect through that.   Essentially you are "tethering" your iPad or Laptop to your Smart Phone that is now acting as the data source.   Hope that makes sense.
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