What happend in the past that they comu up to invent smarthphones

Thomas A. Watson, one of Bell's assistants, was trying to reactivate a telegraph transmitter. Hearing the sound, Bell believed that he could solve the problem of sending a human voice over a wire. He figured out how to transmit a simple current first, and received a patent for that invention on March 7, 1876.

Explanation: Technology is always evolving, and so have humans.  They've gotten even smarter so therefore we've gathered even better resources to enhance and build what we now call,smartphones.

one of these is the rhoticity common in most american accents, because in the 17th century, when english was brought to the americas, most english in england was also rhotic.

were at first enthusiastic in support of the revolution. however, over time divisions of opinion became apparent between federalists and anti-federalists