Question

What do you mean by 4G

Answer 1

Here, G means Generation
That is,4th generation

Answer 2

LTE stands for Long Term Evolution. It's a term used for the particular type of 4G that delivers the fastest mobile Internet experience. You'll usually see it called 4G LTE. Using a 4G smartphone on Verizon's 4G LTE network means you can download files from the Internet up to 10 times faster than with 3G.