I am going with Olo after speaking with them on the phone.
It was quite easy. Called them, told them what I wanted and they will be here tomorrow to set it up. It is a pre-paid unlimited plan. I can also change the velocity from month to month. No contract, no fuss. We will see how the service is... I will update everyone!
From the U.S.
Lived in Peru since August, 2014.