I would like to have cell access during an upcoming trip to Peru. The plan so far is to spend a few days at an as of yet unchosen lodge near Iquitos and a few days in Cusco/Machu Picchu. I assume that there is cell access in Cusco, but what about the other places? Is there a preferred company for SIM cards?

Quite honestly, I am getting tired of collecting SIM cards from various countries. Does anyone have a recommendation for a global SIM card that really works? I understand the minute rate would be high, but so is buying SIM cards that all seem to expire in 6 months.

Thanks.