Sorry, but cell phones only go back to 1928 or so, and they didn’t come with phones until later. :^)
https://www.google.com/search?q=cell+phone+time+travel
That’s just what they want you to believe.
You know anyone without a cell phone?
I don’t know anyone without a cell phone.
That means no one has ever been without a cell phone!
See? I can do science too.