Typical data consumption in travel scenarios ranges from 50 to 80 MB per day or 1.5 to 2.3 GB per month: mobile data for small volume on the go for VOIP, FB, e-mail, etc., and large volumes, HD video, photo upload, system updates, for WiFi.
For example: in Guadeloupe Surfroam costs € 0.01 per MB, and 80 MB will cost you €0.80 (approximately $0.89).