The way that cell phone communications changed in the 1990s was that:
D. Cell phones allowed people to be in constant contact.
How did the cell phones help communication?
This was through the fact that the use of these phones helped people to move around with the gadget.
These phones were not reclined to one point like the telephone. It could be moved from one area to anothger. They were mobile.
Read more on communication here: https://brainly.com/question/26152499 #SPJ2
