Porto eSIM — plans from ₹299.00

Francisco Sa Carneiro (OPO) is a compact, efficient airport with a metro station attached, so the violet line into the city starts a short walk from arrivals and runs through to Trindade. Operator counters at the airport sell prepaid Portuguese SIMs, but the choice is narrow, the queue is real when several low-cost flights land together, and it is a poor trade when the metro is waiting.

Bolt and Uber both operate in Porto and pick up from the designated area outside. Where data becomes essential is the descent into Ribeira: the old town falls steeply to the river in a tangle of stairs and alleys, house numbering is inconsistent, and taxi drivers will drop you at the top of a street rather than at a door that no car can reach. An eSIM installed at home on Wi-Fi solves that in advance, because the profile is live as soon as your phone registers on a Portuguese network and the validity clock only starts at that first connection.

MEO, NOS and Vodafone Portugal build the north, and your plan follows the strongest partner signal. Porto has 5G across the Baixa, Boavista, Cedofeita, Foz and the Vila Nova de Gaia riverfront where the port lodges are, with dependable 4G in the steep Ribeira lanes and along the river. The metro is largely above ground here apart from the central tunnel section, which is covered. Day trips hold up well: Braga, Guimaraes and Aveiro are fully connected, and the coastal line is fine. The Douro valley is the interesting one, with good signal in Regua and Pinhao but long quiet stretches where the railway runs tight against the gorge walls.

Download an offline map of Porto and Gaia together, since the two banks are joined by bridges at different levels and mapping apps regularly send walkers to the wrong deck of the Dom Luis I bridge. Keep data for Bolt, port lodge tour bookings and the train app if you are doing the Douro line. Cafe Wi-Fi is widespread and hotel Wi-Fi is solid, while a hotspot is enough for a laptop day. The specific quirk here is the Douro: a valley cruise or the train up to Pinhao takes you in and out of signal for hours, so download tickets and maps before you leave the city. Riverside stairs also flatten batteries. Lisbon shares the Portugal eSIM plan.