4G - Wikipedia
https://en.wikipedia.org/wiki/4G
4G is the fourth generation of broadband cellular network technology, succeeding 3G. A 4G system must provide capabilities defined by ITU in IMT Advanced.
4G vs. LTE | The Differences Explained
https://www.digitaltrends.com/mobile/4g-vs-lte/
When it comes to wireless broadband standards, there are a few too many acronyms to keep track of. However, none are more important than LTE and 4G, which both provide cellular data transfers.