Which carriers matter, what buying a SIM involves, and when an eSIM is the smarter move.
Reliable mobile internet at better prices than most travel eSIMs, with polished iOS and Android apps and support for making and receiving phone calls.
One of the biggest travel eSIM brands, with a very large destination catalog.
Known for unlimited-data plans in many destinations, at a higher price per gigabyte.
The very cheap Lycamobile deal at the Lisbon airport money-exchange counter (roughly $10 for 25 GB) is known for blocked tethering, aggressive promo texts and APN settings you must enter manually, so skip it if you need a hotspot. Portuguese SIMs work in Madeira and the Azores; pick NOS for Madeira.
Strong, reliable network nationwide and the recommended pick for Madeira.
Best rural coverage for the Douro, Peneda-Geres and Minho villages, with the cheapest top-ups. Both MEO and NOS are good in the Azores.
Often the most data for the money and the fastest urban speeds, slightly less consistent inland.
Low-cost newcomer; rural and coastal coverage is still inconsistent.
Runs on MEO's network and is very cheap, but comes with catches worth reading below.
A passport is required to buy a prepaid SIM and registration is completed in-store; you do not need a NIF (Portuguese tax number) for a tourist SIM. Digital-first providers Woo and UZO do require a NIF or local bank account, so they are not an option on a foreign passport.
Moderate. Airport desks offer limited choice at around EUR 10-25 versus roughly EUR 10 for a 50 GB+ city bundle, so buying in town gets you more providers and better deals.
Guac eSIM covers Portugal with data plans starting from $1.50 per GB and instant activation, so your phone is online the moment you land. Airalo and Holafly are popular alternatives.
SIM cards and eSIM in Portugal