How to found out if the area I live in is 4G capable?

I heard that certain areas are 4G capable only and if you don't live in that area, and get a 4G phone, you'll have tons of problems.
I'm wanting a new phone and I DON'T want an iPhone. I want to try an Android for the first time!

Do a google search
If you want Verizon 4g just search up: verizon 4g coverage

I wouldn't think so. I haven't done research but I'm sure phones made for different carriers are built with their network in mind. I have AT&T and my phone still reverts back to 3G, G and Edge when I fall out of range of the better networks. Also, all carriers will have their coverage maps on their website. You'll just have to do some digging and you'll find it. And a little advice about Android phones, most of the new ones are similar in power and can do anything and everything you'll ever need, but the main difference is the overlay that the individual companies use to have you interact with the phone. I have a Samsung and it's interface is pretty clean, but I can't speak for other companies so go and try them out.