eSIM for Peru: from Cusco to Machu Picchu, where signal drops
Most travelers' routes through Peru follow one axis: Lima, Cusco, the Sacred Valley, Machu Picchu — and signal behaves differently on each leg. In the cities at altitude, coverage works nearly as usual, but on the Inca Trail and at the citadel itself, cellular coverage drops out almost entirely — worth planning around in advance, not while already on the way up.
Cusco: 3,400 meters up and the first days of acclimatizing
Cusco sits at roughly 3,400 meters, and many travelers spend the first day or two taking it easy while adjusting to the altitude rather than sightseeing hard. That's exactly when internet is most useful: checking altitude sickness symptoms, finding the nearest pharmacy on a map, messaging the hotel if you need to push an excursion back a day.
Coverage in the city itself is solid across the historic center and Plaza de Armas — signal in Cusco is as reliable as in any large Latin American city, and the quirks come from altitude affecting your body, not from a coverage gap.
On your first day in Cusco, keep an offline map of clinics and pharmacies near your hotel handy — how you feel at altitude can change faster than expected.
The Sacred Valley: Pisac, Ollantaytambo and the towns in between
The Sacred Valley isn't one stop but a chain of towns and archaeological sites between Cusco and Machu Picchu: Pisac with its terraces and market, Ollantaytambo with its fortress and the train station most Machu Picchu trains leave from. Signal is usually present in the towns themselves, but on the mountain roads between them and at lookout points, it can drop on switchback sections.
For anyone driving or touring the valley over a few days, it's worth saving an offline map of the whole route and each town's hotel address in advance — switching between coverage zones in the mountains isn't always seamless.
- Cusco and Pisac — town centers have solid coverage
- Ollantaytambo — signal in town, weaker on the approach mountain roads
- The train to Aguas Calientes — signal drops on parts of the mountain route
- Valley lookout points — plan for no signal at all
The Inca Trail: four days of hiking with almost no signal
The classic Inca Trail is roughly a four-day trek over mountain passes above 4,000 meters, and cellular coverage is absent along most of it — the trail runs through a national park far from towns and towers. Permits are sold in advance in limited numbers, so all booking details, the guide's contact and the agency's number are worth saving offline before setting out.
Groups hiking with porters and a guide generally don't rely on phones at all out there — signal shows up at a few elevated camps, but not reliably. It's smart to tell people at home in advance that the four days on the trail will be offline.
Machu Picchu and Aguas Calientes: signal below, not at the citadel
The town of Aguas Calientes at the base of the mountain, where visitors catch a bus or hike up to Machu Picchu, is usually covered — it has hotels, cafes and the train station. At the citadel itself and on the Huayna Picchu lookout, signal is noticeably weaker or absent entirely, since the site sits on a mountain ridge away from any towers.
Machu Picchu tickets and entry times are tied to a specific slot, so it's worth saving everything — the ticket QR code, passport details, bus schedule — on your phone in advance; hunting for it with no signal at the turnstile is inconvenient.
Lima and the coast: a contrast with the mountain leg
Many trips to Peru begin and end in Lima, a large coastal metropolis where coverage is reliable almost everywhere, from the historic center to the Miraflores seafront. After a few days with limited signal in the mountains, connectivity in Lima can feel almost excessive — a good moment to back up trip photos and video or make a video call home.
For a combined trip — Lima plus the mountain leg with Cusco and Machu Picchu — it's usually easier to take one plan with enough data for the whole route rather than budgeting separately for city and mountains: usage differs a lot between the two, and the combined total evens it out.