These aren't literally "phone" doodles, because you can't really draw while on the phone anymore, since phones are not designed to fit human heads in this advanced age of technology. It's up to our heads to evolve into cubes and our mouths to migrate to the same side as an ear to catch up with the advanced modern phone design.
I still call them phone doodles though because they are made absent-mindedly the way we used to draw while talking on the phone.
Doodles are not functional drawings, because they are drawn by automatic memorized hand and wrist motions, rather than being guided by the brain with an end purpose.
Sometimes the mindless hand will accidentally create something interesting, although mine didn't this day.
The original Stimpy design was a phone doodle that evolved over many conversations.
These are pretty conservative as phone doodles go.
Maybe they would be more creative if they still made real phones to talk through.