Some actual examples or tips for using an iPad as a phone would be appreciated, as well as examples of the downsides. For example, without the cell network, you'll presumably need to use wifi calling, which my network doesn't provide. Also, even the mini would be hard to hold up to your ear to talk.

You might not be a native English speaker, but please learn when and when not to use commas in your writing. Many of your sentences are hard to read because you've sprinkled commas in like salt on french fries.