A mobile phone is meant to be used to make and receive telephone calls. That is its raison d'être from the very beginning and why it is called like that.

Do you see how stupid that sounds?

It... doesn’t? PDAs won, there are nearly no mobile phones being made anymore. The thing you call a mobile phone is a PDA with an incidental value-add of placing phone calls. (I had been wondering for some time why the UX of talking into a headset had been on the decline for the last 20 years until I encountered this idea; sadly, I don’t remember where.)