Mobile data in India: what to expect
India has one of the most aggressive mobile-data markets on earth. Jio and Airtel between them have rolled out 4G almost everywhere people live and 5G across a huge and growing list of cities, with Vodafone Idea as a third option. For a traveller this means fast, cheap-to-deliver data in Delhi, Mumbai, Bengaluru, Hyderabad, Chennai, Kolkata, Jaipur and the major tourist circuits — easily enough for maps, video calls, streaming and uploading photos. The reason a travel eSIM is so useful here is the alternative: getting a local Indian SIM as a foreigner means passport copies, a photo, address proof and an activation wait that can stretch to a day or more. An eSIM rides the operators' roaming layer, activates on arrival, and skips that paperwork entirely.
Coverage across India
The strong-signal map is broad. All the metros and second-tier cities — Pune, Ahmedabad, Surat, Kochi, Goa's coastal belt, Chandigarh, Lucknow — carry dependable 4G and increasingly 5G. The Golden Triangle (Delhi, Agra, Jaipur), Kerala's backwaters towns, and the Rajasthan tourist cities are well covered. Where it thins is predictable: high-altitude Himalayan regions like Ladakh, Spiti and parts of Himachal and Uttarakhand have real dead zones and, in some sensitive border areas, prepaid roaming data simply does not work; long desert and forest stretches, remote village roads, and the interiors of national parks on safari drop to slow or no signal. On the Konkan railway and other scenic long-distance train routes, expect coverage to come and go. Download offline maps before any mountain or backcountry leg. It is also worth knowing that the authorities occasionally impose localised internet shutdowns in specific districts during unrest or major events — these are regional and temporary, but they affect every network equally, so no SIM or eSIM is immune. For ordinary tourist routes this is rarely a factor, but it is the honest caveat for travel into more sensitive border or interior regions.
How much data you'll need
India can be a heavy-data trip if you let it. The everyday apps are Google Maps, WhatsApp (the default for everything, including how many hotels and drivers communicate), Uber and Ola for rides, Google Translate's camera for signage and menus, and Instagram. Many travellers also rely on data to look up places, check train status on apps like the official rail tools, and occasionally scan a UPI QR code (note that mobile UPI payments themselves need an Indian bank account, so most foreigners just observe rather than pay that way). A week mostly in cities runs comfortably on around 8–15 GB; two to three weeks across the Golden Triangle, Goa and the south, with steady navigation and social use, lands closer to 20–30 GB. If you stream or hotspot a laptop, size up toward an unlimited-style plan. The plans above show what is live — start generous, since India's distances mean you will lean on maps a lot.
Keep your number and WhatsApp
You do not need to drop your home number to get Indian data. A dual-SIM phone runs the eSIM for data while your usual SIM keeps your number for calls, SMS and bank one-time codes — which matters, because many home banks send verification texts you will want during a long trip. WhatsApp stays on your existing number, so contacts and groups carry over untouched. Switch your home SIM's data roaming off so it cannot quietly burn money in the background while the eSIM does the work.
Before you fly
Check your phone supports eSIM — most iPhones from the XR onward plus recent Samsung, Pixel and Honor models do; our compatibility checker confirms in seconds. Buy and install on home Wi-Fi a day or two before departure; the plan stays dormant and activates when you first connect in India. It comes online the moment you land at Delhi (DEL), Mumbai (BOM), Bengaluru (BLR) or Goa (GOI/GOX), so you are already connected when you step out to find your prepaid taxi or Uber.
A wider Asia route?
If India is one stop on a longer journey through the continent, a regional Asia plan can keep you online across several countries on a single eSIM — handy for a route that pairs India with Nepal, Sri Lanka or Southeast Asia. For an India-only trip, a dedicated country plan is the simplest and cheapest way to land connected.