Internet and SIM cards in Sri Lanka, a working guide

Buy a local SIM at the airport when you land: Dialog and SLT-Mobitel both have counters in the arrival hall, you need only your passport, and a month of data costs a few dollars. Mobile data is the strong part of Sri Lanka's internet, so that SIM is also your backup when a Wi-Fi drops.

Which operators are there?

Three names matter to a visitor.

• Dialog. The largest network. Guides written by people who work remotely on the south coast say it has the widest coverage along the coast.
• SLT-Mobitel. The mobile arm of Sri Lanka Telecom, and the usual second choice. SLT also sells the fibre lines that many houses and colivings use.
• Hutch. A smaller network, often priced a little lower. Its reach is reported as a little less than the other two.

You may read about Airtel in older guides. Dialog bought Airtel's Sri Lankan business in 2024 and the two companies were merged.

Where do you buy a SIM, and what does it cost?

At Colombo's airport, after customs. Dialog has two stores in the arrival hall, and SLT-Mobitel has counters there as well. Staff put the SIM in your phone and switch it on. A SIM has to be registered to a passport, so buy it from a counter or a shop of the operator, not from a stranger.

For prices we quote one official page and no more. When we read Dialog's tourist page in November 2026, it listed monthly plans, tax included, at 1,399 LKR for 20 GB, 1,799 LKR for 30 GB and 2,450 LKR for 50 GB. That is roughly four to seven US dollars. Plans change often. Look at the operator's own page before you land.

If you miss the airport counters, every town has shops of the operators. In smaller places, look for a shop with "Communications" on the sign. You top up online or through the operator's app.

Is an eSIM possible?

Yes, in two ways.

• From a local operator. Dialog sells an eSIM, and it can set up a tourist eSIM at its stores. SLT-Mobitel is reported to offer one at the airport as well. You get local prices, and you still show your passport.
• From a travel eSIM company. You buy it at home and it works when the plane lands. It is the easy way, and it usually costs more for the same data than a local SIM.

A middle path many people take: a travel eSIM for the first days, a local SIM for the rest of the stay. Check first that your phone is unlocked and that it takes an eSIM at all.

How fast is it, and what about coverage on the south coast?

Here are dated numbers from a source that measures, not ours.

• Mobile: a median download speed of about 46 Mbps.
• Fixed lines: a median of about 32 Mbps.

Both are Ookla's figures for Sri Lanka at the end of 2025, as given in the Digital 2026 report by DataReportal. Mobile speeds had more than doubled in a year. These are national medians. A village on the coast can be above or below them, and a line shared by a full cafe is slower than the same line at seven in the morning.

To put the numbers to work: Zoom asks for about 3 to 4 Mbps in each direction for a group call in full HD, and less than 1 Mbps for an audio call. So speed is rarely the trouble. Stability is.

Two more things have changed the picture. Starlink has been available in Sri Lanka since July 2025. And a guide for remote workers, updated in June 2026, says many colivings now have fibre while cafes are still catching up.

As for coverage: for one address, the operators' own coverage maps are the place to look. What we can pass on is what people who work here report: Dialog is named most often as the strongest network along the coast, and mobile data is what they lean on when a Wi-Fi fails. At Ohana itself, SLT-Mobitel has the strongest signal.

Inside a house it is a different question. Thick walls and a room at the back can cut a signal that is strong in the garden. Before you rent for a month, stand in the room where you will work and run a speed test on your own phone. Do it in the evening too, when everybody is online.

Which backups are worth having?

The grid still fails now and then in Sri Lanka, and when the power goes the router goes with it. People who work here for a living keep a short list.

• A SIM with plenty of data, used as a hotspot. This is the one that matters.
• A second SIM on another operator, if your work cannot stop. They are cheap, and it is unlikely that both fail together.
• A power bank that can charge a phone several times, and a laptop charged to full every night.
• Files offline. Download what you need for the day before the day begins.
• A plan B place. Know one cafe or coliving with a generator, and one with a different internet line from yours.

And at Ohana?

We have Wi-Fi and a power socket at almost every table, and a long table of 20 seats in the shade kept for guests who work. On 13 November 2026 we measured our Wi-Fi, an SLT line, at 72 Mbps down, 23 Mbps up and a 10 ms ping. When the grid goes down, a generator keeps the power on.

Bring your hotspot as you would anywhere on this coast. What a working day with us looks like is on our page for coworking by the sea in Dikwella. For the wider picture, read our digital nomad guide to Hiriketiya and Dikwella, and before your first meeting outdoors, video calls from the beach.

Good to know

• Ohana is at Turtle Beach, Dikwella, less than five minutes by road from Hiriketiya, open every day.
• There is Wi-Fi and there are power sockets. Filtered water is on the house.
• Coffee is made from 08:00 to 18:00, and the kitchen cooks from 08:00 to 21:00.
• Prices are in LKR, plus a 10% service charge.