StraightTalk. Get it at Wal-Mart.
Contract free pay as you go plan.
For $30 ( plus $2 and some change for taxes) you get 1,500 minutes of talk time, unlimited messages, and 100 mb of internet.
$45 is unlimited for non smart phone.
I maybe text 4 times a month and don't do internet, and usually have around 400 minutes left over a month...so it's my perfect plan.
They lease tower rights from Verizon, AT&T, T-Mobile and Sprint, so you pretty much have coverage anywhere you can get coverage.
Disclaimer: I did away with my smart phone for a flip phone a few years ago. When it comes to cell phone, I like the ones where you call somebody and they talk to you, or when they call you - you talk to them.
If you have to have a smart phone, straight talk has a $45 a month contract free plan that has to be used for their smart phones. Still cheaper than pretty much all the carrier plans.
I paid $37 for my phone and it's mine forever and it was totally off the grid until I used my debit card to renew my plan, which means I set up an account with straight talk online.