Landline internet service

I live in the U.S. and do not speak spanish. My mother is a missionary in Guatemala but is not tech savy. As a missionary she lives in a region with no cellphone service but she does have a land line. Can anyone tell me who to contact or how to get her a modem and internet service provider? Google is no help and not speaking spanish is really hindering me. Thanks  :D

Not all internet provideds are available in each town. Where is she? Best is Tigostar, Tigo or Claro

If she can use Claro I would recommend it. I have it at my office and it works very well plus you can size the quantity of bandwidth you need.