Before you start

Passport and valid Indian visa
Proof of a Kochi address — a hotel or serviced-apartment letter is accepted early on
Passport photographs
An unlocked handset; confirm eSIM support at the store rather than assuming it

Step-by-step

1
Bridge the first days with a travel eSIM
A data-only eSIM bought before departure means you land connected while KYC runs its course. It will not give you an Indian number, so treat it as a bridge rather than a solution.
Mobile appWho: YouDay 0
2
Go to a company-owned Jio, Airtel or BSNL store
Branded stores in Ernakulam, Edappally and Kakkanad process foreign passport KYC routinely. BSNL is worth knowing about here — the state-owned operator has stronger rural Kerala coverage than it does in most of India.
In personWho: YouWeek 1
3
Bring a full document set
Passport, visa, address proof, photographs, employer letter and FRRO registration where you have it. Requirements vary by operator and store manager, and a complete set avoids a second trip.
In personWho: You
4
Complete tele-verification promptly
The SIM typically receives calls before it can make them. An automated verification call confirms your details and only then do outgoing calls and data activate — anything from half an hour to two days.
Mobile appWho: You
5
Register the number with your bank and link UPI
The number registered with your bank is the number UPI will use. Get it right first time; changing it later is a branch process.
Mobile appWho: YouWeek 2
6
Diarise the SIM's validity with your visa
Connections issued to foreign nationals are commonly capped to visa duration and need re-verification when the visa is extended. People find out when the number simply stops.
In personWho: You

Documents you’ll need

Original passport and visa page
Proof of Kochi address
Passport photograph
Employer letter, and FRRO registration where available

Things most newcomers don’t know

Kerala has among the best mobile and fibre coverage in India, and it is not an accident.

The state's high literacy, dispersed settlement pattern along a continuous urban corridor rather than concentrated in a few cities, and a very large diaspora making international calls have produced unusually dense telecom infrastructure. Coverage holds up in places that would be dead zones in Rajasthan or Madhya Pradesh, and home fibre is cheap and widely available even in outlying areas. If your work depends on a connection, Kerala is one of the easier states in India to live in.

Source: community-reported

Losing the number means losing your money, not just your calls.

Indian financial infrastructure is built on the mobile number: UPI is bound to it, bank one-time passwords go to it, account alerts arrive on it. A SIM deactivated because a verification call was missed, or a visa-linked validity lapsed, locks you out of payments entirely. That is the argument for using an official operator store and completing verification the same day.

Source: community-reported

A local eSIM gives no shortcut around in-person KYC.

eSIM does not mean remote activation in India. A Jio or Airtel eSIM still requires in-person passport verification; the eSIM removes only the plastic. International travel eSIMs work from day one but cost far more per gigabyte and never give you an Indian number, which is what UPI and your bank need.

Source: community-reported

Heavy monsoon rain degrades fixed connections more than mobile ones.

Kerala's monsoon is genuinely heavy for four months, and older copper and aerial fibre runs in the city are prone to water ingress and physical damage during it. Mobile data holds up better. Anyone working from home here should treat a mobile hotspot as a planned fallback rather than an emergency measure, and should ask whether the building's fibre run is underground before signing a lease.

Source: community-reported