why don't other animals build cell phones?

It's the old Douglas Adams thing, isn't it? To paraphrase:

Humans think they're more intelligent than dolphins because they can build machines and cities and civilisations while dolphins just play about in the sea catching fish.

Dolphins think they're more intelligent than humans for exactly the same reasons.

It's like I always say, we spoil these lazy animals and then wonder why they never move out of the house.
They never even pay the cable bill or cut the grass!!

Well, I AM DONE tossing peanuts and bananas to all of the Elephants and Baboons in my yard!
They better get jobs and enroll in night classes because I'm tired of carrying the burden.
Sheesh, they don't even shovel snow... wild animals are lazy hobos in my opinion.

These filthy animals will never learn unless we use tough love I say!

Clyde's orangutan relatives in Sumatra have been observed using early Nokia style phones in the wild.

A broader question: What is the point of animals?
https://www.youtube.com/watch?v=mpPEU1ZgMHg&t=54s

evolution

Co-operation.

Jane Goodall, who knows more about the species that we evolved from than most all other people, says that it is the one thing apes/chimpanzees lack, and separates the human race from the animal kingdom.

Don't remember the exact quote but something like.. "You will never see two chimps or apes moving a object together for a common goal, like moving a large log blocking access to water/food"

They use ESP to stream videos.

Why don’t all humans build cell phones? Seems most use them but only a few smart ones knew how to build them.