For a typical 3 to 5-day Rome and Vatican trip with daily Google Maps navigation, ride-hailing on FreeNow or Uber, and casual photo uploads, 5 GB is enough for most travelers. A 7 to 10-day Italy trip combining Rome with Florence, Venice, or Naples usually needs 10 GB to 25 GB. Heavy users uploading content from the Vatican Museums or working remotely should pick the unlimited plan. Italy's app-driven travel ecosystem — Trenitalia and Italo train apps, ATAC bus maps, museum ticket QR codes — consumes more data than expected.