For the time being, my wife and I use Straight Talk ($45 mo = unlimited talk/text + around 1-1.5GB of data [it's unclear]) It's an AT&T MVNO, and no 4G, but it

For the time being, my wife and I use Straight Talk ($45 mo = unlimited talk/text + around 1-1.5GB of data [it's unclear]) It's an AT&T MVNO, and no 4G, but it works for us, and is the cheapest option I could find. (We both have unlocked iPhones.)