Making calls with a data-only eSIM is easy! Here are two different methods:
1. Make and receive calls over the internet using a service like WhatsApp, FaceTime, Messenger, Skype, Zoom, etc.
2. Make and receive calls using your primary mobile number, even while using an eSIM as your data connection.
With this option, your provider may charge you for calls and texts sent and received outside of your normal coverage area. (These charges will appear on your next bill, with phone calls charged per minute and texts charged individually.)
You can ask your carrier, prior to your trip, what they charge for calls and texts. Then you can make a decision on whether or not to use your primary mobile number while you're away.
The good news is that using your aloSIM eSIM data will prevent you from racking up roaming charges, so you'll have access to low-cost data that has nothing to do with your carrier.