I have Verizon Mi-Fi. Had 3G, now have 4G. 3G is fine. I see no big difference. If you sign a contract with Verizon, you can suspend it 2x per year up to 6 months I believe. My sister does that. We full time so mine is on all the time. I have used it all over the USA with only 2x when I couldn't get service. (no cell service either). I also bought a Wilson Sleek online at Walmart for a little over $100. Got the taller window mount antenna. In fringe zones I can now get on the internet. Of course if you have no service, the booster won't help.