For a typical 5 to 7-day Lisbon and Porto city trip, 5 GB to 10 GB is enough for most travelers. A 10 to 14-day trip adding the Algarve, Sintra, and Douro Valley with daily Google Maps, ride-hailing, and casual photo uploads usually needs 10 GB to 25 GB. Heavy users uploading content from beach trips, attending Lisbon's nightlife or working remotely from Ericeira surf cafés should pick the unlimited plan. Hotspot and tethering are allowed on the fixed-data plans but not on Unlimited plans, which are designed for single-device use.