Pro Tip: If you manually "change your plan" every 29 days it will carry over your minutes and data to the next month. So I just add 1 GB and 100 mins every 29 days, and they accumulate over time. Its really useful when I travel because I have extra data I can use from prior months.

They use the Sprint towers, so it's not the greatest. Also, unless it's my phone (iPhone SE 1), the quality of audio while doing a normal phone call is terrible.

However, their plans are at a very low price, so it's not too bad! I would recommend them.

Totally worthless in rural GA.

For low call and data usage, I found Tello is the best of all the low-cost carriers I have used. There is no per line charge and you pay by the amount you estimate. Even better is the pay go service, where you pay $0.01 per min/sms/mb you use. This never expires. International rates are also ridiculously low. There is also a referral program.