The following I have an iPad and would like to play with people who have Minecraft on their mobile phones. Is it possible? (All have iOS devices)
Yes, it's possible.
To do this, you have to be logged in to XBOX Live and be friends or be in the same Wi-Fi network.
Then someone goes into his world and then his friends see this world in the friends area.
You can also play together over a realm or server.
A server is simply one or more worlds that can be entered by anyone with an IP if they have the right to do so.
A realm is almost the same, but there are still differences:
But I recommend the variant with XBOX Live or with the same Wi-Fi network.
Unfortunately we don't have the same Wi-Fi