eSIM for Chennai

Price: from $1.29
Data: 100 MB – 20 GB or unlimited
Validity: 1–180 days
Speed: 4G LTE / 5G
Host networks: AirTel
Coverage: Chennai

Select your planIn stock

Duration

Choose your package

Quantity

Unlimited data · 3 Days$5.99

Unlimited data · 3 Days ×1

$5.99

Going to more than one country? See regional plans

Does my phone take an eSIM? Check now

Dial *#06# on your phone. If you see an EID number, your phone takes an eSIM. Most phones sold since 2019 do.

Not sure it works on your phone? Check compatibility

Install before you fly

How do you install and activate it?

1
Buy before you fly
Pick a country and a data size; pay with Apple Pay, Google Pay or card.
2
Open the email
Your QR code arrives in minutes. Scan it while you still have wifi.
3
Land connected
Switch data to Viasimo on arrival. Your own number keeps working for calls.

Network

Which networks does the Chennai eSIM use?

Host networks: AirTel

Your eSIM picks one automatically; you do not choose or switch between them.

Data: 100 MB – 20 GB or unlimited
Validity: 1–180 days
Speed: 4G LTE / 5G
Hotspot / tethering: Supported on most devices
Activation: Starts when you first connect in your destination
Speed management: Full speed to the plan's limit, then 512 Kbps
Top-ups: Add more data from your account, before the plan expires
Text messages (SMS): Data only: use an app for verification codes
Connects via: Singapore
Unused validity: 180 days before it must be installed

Choosing a plan

How much data do you need?

The allowances below are our sizing recommendations, not measurements. The plan beside each one is the cheapest option on this page that covers it.

Recommended data allowances matched to the plans sold for this destination
You are	Plan for	Cheapest plan that covers it
LightMaps, messaging and the occasional lookup	About 1 GB a week	$2.291 GB, 7 days
TypicalMaps, social, photos and some browsing	About 3 to 7 GB a week	$9.995 GB, 30 days
HeavyVideo streaming, video calls and uploads	10 GB a week or more	$11.99Unlimited, 7 days
Working or sharingTethering a laptop, calls and cloud sync	20 GB a week or more	$11.99Unlimited, 7 days

Work it out from your own habits

What a week abroad costs

eSIM, local SIM or roaming?

Charged per day

Your carrier roaming

Queue and plastic

A SIM at the airport

$1.29

Viasimo, one bundle

Only the Viasimo figure is a price: it comes from today’s live catalog. The other two rows are directional, not quoted rates.

About this eSIM

Chennai runs on reliable 4G, so you can find your way from the moment you touch down at Chennai International Airport. Wander Marina Beach at sunrise, admire the Kapaleeshwarar Temple in Mylapore, browse the shops of T. Nagar and catch a Bharatanatyam recital, all while staying connected across Tamil Nadu. No roaming bills, no swapping physical SIMs: a quick prepaid setup gets you online for calls, maps and Ola rides right away.

Chennai holds strong coverage through the central districts, along the Mount Road corridor, around T Nagar and out by Marina Beach and the OMR tech belt. It dips in denser older lanes and on the far suburban outskirts. Get the eSIM running over wifi before you arrive so you are online at the airport, and keep your home number active for calls and bank OTP messages. Tip: pin your hotel and the nearest metro station, since cabs struggle on one-way streets.

Unlimited runs at full speed up to a fair-use limit, then continues slower.

Before you buy

Important to know

This is a data-only eSIM. It carries no calls or SMS on its own number.
Your existing number stays on your primary SIM, so calls and verification texts keep working.
Your phone must support eSIM, and some carrier-locked phones cannot install one.
Signal varies with location, terrain, congestion and your handset. Dense urban areas are consistently better served than remote ones.
5G only works where the host network has deployed it and your phone supports it. Everywhere else it falls back to 4G LTE.
The eSIM selects a host network automatically. You cannot pick or switch between them.
Unlimited plans run at full speed up to a fair-use limit, then continue at a reduced speed. Read the fair usage policy

Looking for more information?

Frequently asked questions

Does an eSIM work in Chennai?

Yes. Your India eSIM connects automatically the moment you arrive, with no roaming fees and nothing to set up at the airport. The host networks it can use are AirTel. Coverage runs on 4G LTE and 5G where the network has rolled it out, and falls back to 4G elsewhere.

Do I get 5G in Chennai?

Yes, where it has been deployed. 5G runs on AirTel in India, and your eSIM uses it automatically on a 5G-capable phone, dropping back to 4G LTE outside covered areas. No country is covered everywhere, so 5G availability varies by location.

How much data do I need for Chennai?

These are Viasimo's sizing recommendations, not measurements of your trip. Maps, messaging and the occasional lookup run to roughly 1GB a week. Streaming, video calls or tethering a laptop push that to 3-5GB a week, and uploading photos and video moves past it faster still. The data calculator on this site works it out from how you actually use your phone. Sizing one tier up costs less than topping up part-way through a trip.

Is an eSIM cheaper than roaming in Chennai?

Usually, though it depends on your own carrier. A roaming day-pass is charged for each day it is active whether you use the data or not, while a prepaid bundle is one up-front purchase for a fixed amount of data. The gap widens on longer trips. Check your carrier's published rate for Chennai before you fly rather than taking our word for it.

How do I install my eSIM?

After checkout we email you a QR code. On your phone, open Settings, then Cellular or Mobile data, tap Add eSIM, and scan the code. Installation takes under a minute.

When does my Chennai eSIM activate?

Your plan activates automatically when you arrive and connect to a local network, so your validity period only starts once you land.

Can I keep my regular number?

Yes. The eSIM is data-only and runs alongside your physical SIM, so you keep your home number for calls and texts while using Viasimo for data.

Can I top up or extend my plan?

Yes. You can buy more data or extend your plan at any time from your account before it expires.

Does it support hotspot and tethering?

Tethering is supported on most devices, so you can share your connection with a laptop or other devices.

Where this comes from

Information and verification

Each block below says what was checked and when. Anything we cannot date, we do not claim.

Prices and plans: Every price and allowance on this page is read from the live catalog, not typed in.; Verified September 15, 2026
Host networks: The operator list comes from the network partner that carries this eSIM.; Verified September 15, 2026