Cubansocial gives us a back-of-the-envelope calculation of the monthly cost of mobile Internet activity in Cuba. The estimate for email and a bit of Web browsing is 2-300 megabytes per month. That would cost 1,000 to 1,500 CUC if one paid the following "maximum" rates rates.
Who pays less than the maximum rate? Who uses mobile Internet?
Note the WAP tarif -- a reminder that Cuba is not using current technology.