I need a book and an encylopedia article on the history of cell phones.
To search for books, go to the WorldCat link below. I searched both for cell phone history and for cell phones. For the first search, I got one hit that definitely focuses on the history. For the second search, I found items that might have some interest as well, so you should look and see if any are relevant to your topic.
For encyclopedia articles, go to the Databases by Subject LibGuide tab below and select the History tab. We have a subscription to Encyclopedia Brittanica. I searched cell phone and got an article.