Which carriers matter, what buying a SIM involves, and when an eSIM is the smarter move.
Reliable mobile internet at better prices than most travel eSIMs, with polished iOS and Android apps and support for making and receiving phone calls.
One of the biggest travel eSIM brands, with a very large destination catalog.
Known for unlimited-data plans in many destinations, at a higher price per gigabyte.
Getting connected here is unusually easy: dedicated tourist products, English-language carrier pages and staffed 24/7 airport counters. Pick your carrier by terrain: Dialog for general use and the coast, Mobitel for the hill country, Hutch only if price matters most and you are staying urban. Airtel now operates in Sri Lanka as a Dialog-licensed brand rather than an independent fourth network. Pack validity varies sharply (14 days on Mobitel's tourist SIM versus 30 on Hutch's), so match the pack to your trip length rather than comparing headline gigabytes.
Best overall coverage, reaching roughly 95% of the population on 4G, and the usual pick for tourists. Runs a dedicated Tourist SIM and Tourist eSIM.
State-owned and a close second, particularly strong in rural and plantation areas. The better pick for the hill country.
Cheapest data in the country and fine in cities, but weaker in remote regions.
A passport is required for every tourist SIM and is checked in person, whether at an airport counter or a carrier store. Anyone aged 16 or over can buy, and the whole process takes about 10 minutes.
Effectively none. Sri Lanka is one of the few countries where buying at the airport is genuinely recommended: the counters sell the same standard tourist packs found elsewhere, with a quick passport check and no reported markup.
Guac eSIM covers Sri Lanka with data plans starting from $1.50 per GB and instant activation, so your phone is online the moment you land. Airalo and Holafly are popular alternatives.
SIM cards and eSIM in Sri Lanka