Brazil’s mobile network is large but uneven. In São Paulo and Rio de Janeiro, coverage from Claro, Vivo (Telefonica), TIM Brazil, and Oi is excellent — 4G throughout the city and consistent signal on metro and suburban rail. In the northeast coast cities (Salvador, Fortaleza, Recife), coverage is solid in urban centres and the main coastal resorts. In the Amazon basin, coverage drops sharply: Manaus itself has good urban 4G, but the rivers and jungle routes between towns operate on 3G at best, with genuine dead zones on extended boat journeys.

Yesim covers Brazil and includes the major carrier networks. For a trip focused on the urban South and Southeast (São Paulo, Rio, the coast from Búzios to Florianópolis), Yesim’s Brazil plan delivers reliable 4G in all the relevant environments. Pricing runs $8-$14 for 7 days/3GB and $20-$30 for 30 days/10GB. Tethering is supported — relevant for the many digital nomads and remote workers who run through Brazil’s beach towns. Activate before departure; the SIM profile installation process is straightforward with a functional internet connection and difficult when you’re standing at Guarulhos with a dead battery and a queue behind you.

Airalo covers Brazil on the Claro or Vivo network and is typically the price leader for shorter trips. A 7-day/1GB plan runs $5-$8; a 30-day/5GB plan around $14-$20. For the standard Rio-São Paulo-coastal circuit, this is sufficient data — both cities have extensive Wi-Fi at hotels, cafés, and restaurants, so eSIM data primarily covers navigation and messaging when you’re outside. Airalo’s regional Latin America plan is worth checking if Brazil is one leg of a broader South American trip (Argentina, Peru, Colombia).

Saily covers Brazil and performs well in the major cities. Data caps at the higher tiers are slightly more limited than Airalo’s Brazil plans, but the privacy-first infrastructure is the same as in other Saily markets.

The Amazon context deserves direct treatment. If your itinerary includes a river expedition from Manaus — whether a day cruise or a multi-day jungle lodge trip — accept that mobile data coverage on the rivers is unreliable regardless of which eSIM you carry. The lodge operators and boat crews know this; itineraries are designed around it. Download offline maps, cached navigation, and any entertainment before boarding. The lack of connectivity is not a problem to solve with a better eSIM plan — it is a feature of the Amazon that most travellers find welcome after a week of São Paulo’s urban intensity.

For urban itineraries, the local SIM alternative is worth considering. Vivo and Claro sell tourist SIMs at major airports and in shopping centres countrywide for BRL 30-80 (£5-£13) with 10-30GB valid for 30 days. This is competitive with eSIM pricing and involves no pre-trip planning. The argument for eSIM over local SIM in Brazil is the same as elsewhere: convenience and continuity, particularly if you need your home number to receive authentication codes during the trip or if you’re managing a dual-number setup across borders. Neither is wrong; your device capability and travel pattern should decide.