The first time I flew into IGI for a Delhi-plus-Agra week, I'd assumed I could buy an Indian SIM at the airport and be on my way in twenty minutes. The process involved passport, an Indian address (which I didn't have yet), a form in triplicate, and an OTP that kept failing because my home number wasn't accessible without the SIM I was trying to activate. Ninety minutes later I gave up and took a prepaid taxi to the hotel, where I paid for hotel Wi-Fi for the rest of the week. The next trip I bought an India eSIM at the Dubai layover and landed at Indira Gandhi with Uber already tracking my driver.
Why buying an eSIM beats the airport kiosk
Jio, Airtel, and Vi all operate prepaid counters at Delhi IGI, Mumbai CST, Bangalore, and other major airports. But Indian prepaid SIM regulation requires biometric verification, a local address proof, and OTP activation that frequently fails for international phone numbers. Tourists regularly spend sixty to ninety minutes at the counter and still leave without a working SIM. An eSIM installs from a QR code before you fly, activates on first Indian tower contact, and skips this entire process.
Most travellers into India fit one of three shapes: cultural travellers doing the Golden Triangle (Delhi-Agra-Jaipur) or broader Rajasthan; southern travellers to Kerala backwaters, Goa beaches, or the Tamil Nadu temples; and business visitors to Bangalore, Mumbai, or Delhi corporate sectors. All three want data from the gate onward.
What Jio, Airtel, and Vi coverage actually looks like
India's urban coverage is excellent relative to continent-scale geography. Delhi's central districts (Connaught Place, Khan Market, Hauz Khas, South Ex) all have strong 4G and widespread 5G on Jio. Mumbai's Bandra, Colaba, Lower Parel, and the Western Line suburbs have similarly strong coverage. Bangalore, Chennai, Kolkata, Hyderabad, and Pune have solid 4G and growing 5G.
Tourist destinations have generally strong coverage. Agra (Taj Mahal), Jaipur, Udaipur, Jodhpur, Varanasi, and the Golden Triangle route all have 4G throughout. Goa's coastal strip from Anjuna through Palolem has strong coverage. Kerala's backwaters around Alleppey and Kumarakom have 4G at resorts with some thinning mid-backwater. Rajasthan's Thar Desert dunes around Jaisalmer thin outside the city.
The Himalayan foothills — Rishikesh, Dharamshala, Manali, Gangtok, Darjeeling — have 4G in towns with some thinning on mountain roads. High-altitude destinations like Ladakh, Spiti, and remote Arunachal Pradesh routes can lose signal for extended stretches.
Jio has the widest national footprint and by far the largest 5G coverage in India. Most travel eSIMs route through Jio.
How the major eSIM providers compare in India
Pricing models vary across providers. Custom plans, where you set data amount and validity independently rather than picking from preset bundles, are 99esim's distinguishing feature and the only option in the tracked set for that level of flexibility. Airalo sells fixed bundles with the widest country list in the category. Holafly sells unlimited-day windows. Nomad covers India on a fixed-bundle model. Ubigi prices on short-validity country tiers.
Indian pricing is among the cheapest in Asia across every tracked provider. Nomad, Ubigi, and 99esim converge at very competitive entry tiers for India. Holafly's per-day unlimited model is usable for heavy-data cultural or business trips. Per-GB economics on fixed-bundle providers are compelling. The matrix below spells out the per-axis shape for India specifically.
Install timing: when to set it up
Install the eSIM the night before you fly, or during a Dubai, Doha, Singapore, or London layover. The QR code generates immediately after payment; scan it with your phone's eSIM settings; the profile installs but doesn't activate until it first sees an Indian tower. At the gate, switch your home SIM's data off and land at IGI, CST, BLR, or MAA with data already working.
iOS 17.4+ devices can install directly from a provider's app without scanning a QR code, on providers that support it. Android users still scan a QR code, which takes thirty seconds.
Who should pick what
A one-week Golden Triangle trip works on a 5 to 10 GB plan across any of the tracked providers. Custom-plan providers let you size precisely.
A two- to three-week India circuit covering Rajasthan, Kerala, or a wider route benefits from a 10 to 20 GB plan because inter-city navigation, photo uploads, and daily coordination add up.
A business trip to Mumbai, Bangalore, or Delhi fits a 5 to 10 GB plan across any provider.
A heavy streamer or content creator posting daily from Varanasi, Udaipur, or Kerala without meter anxiety fits Holafly's unlimited-day model better than per-GB providers.
A short two- or three-day business visit fits Ubigi's short-validity tiers or Nomad's competitive entry tier.
A group of three or more travelling together, particularly a family heritage tour or business delegation, benefits from 99esim's group eSIM, which covers up to four devices on one purchase. None of the tracked competitors offer that product today.
A note on multi-region India
India is too large to treat as a single travel destination; the connectivity-relevant practical point is that the major travel eSIMs route through Jio or Airtel's national roaming arrangements and deliver reasonably consistent quality across the metros and major tourist destinations. The significant exceptions — Ladakh, far-Northeast states, deep tribal areas in central India, and some Himalayan treks — are connectivity challenges for every provider including local SIMs. Offline maps and a satellite-messenger option for serious trekking remain sensible regardless of which eSIM you buy.