Malaysia: two terminals, two land masses, and permits that run out.

Malaysia's main operators — Maxis, CelcomDigi, U Mobile and Yes — all sell tourist prepaid plans, registration is straightforward against a passport, and there are counters and vending options in the arrivals areas at Kuala Lumpur International. Data is inexpensive and network quality on the peninsula's west coast corridor, from Penang through Kuala Lumpur to Johor, is good.

The thing to plan for is Malaysia's geography. The country is in two parts separated by the South China Sea, and while a Malaysian plan works in both, the experience is not uniform. Coverage in Sabah and Sarawak is concentrated around Kota Kinabalu, Kuching, Miri and Sandakan and drops away quickly in the interior, on the rivers, and on the dive islands. If your trip includes Borneo, download offline maps and treat any island stay as effectively offline.

The same caution applies to the peninsula's islands. The Perhentians, Tioman and Redang have limited and sometimes intermittent service, and Langkawi is fine in town and patchy at the northern beaches. A plan cannot fix a lack of towers; preparation can.

An eSIM is particularly convenient here for one reason beyond the usual: if you are arriving into Terminal 2 on a low-cost carrier with a tight onward connection, or crossing overland from Singapore, you do not want a SIM-counter stop in the middle of it. Regional multi-country eSIMs also suit the common Singapore–Malaysia–Thailand overland routing.

Standard international cover — emergency medical, evacuation, cancellation, delay and baggage — is the right baseline for Malaysia, and the private hospitals in Kuala Lumpur and Penang are of a high standard and used to treating international patients. The country's medical tourism sector means direct billing arrangements are more common here than in some neighbours, but it should still be confirmed rather than assumed.

What makes Malaysia distinctive is the activity profile. Diving at Sipadan and around the Perhentians, climbing Mount Kinabalu, caving at Mulu, jungle trekking in Taman Negara, and river travel in Sarawak are the reasons many people come, and each engages a different exclusion. Altitude clauses can be triggered by Kinabalu. Diving cover has depth and certification conditions, and the nearest hyperbaric facilities in Borneo are not close to the dive sites. Evacuation cover in Borneo is meaningfully more valuable than on the peninsula, because distance is the problem.

Dengue is present across Malaysia and is a routine reason for hospital admission among visitors, which is a straightforward argument for adequate medical limits rather than a token policy.

Malaysia has not generally presented travel insurance as a documented condition of tourist entry for Indian passport holders, but conditions are set by the government and can change. Confirm the current position with Malaysian immigration rather than relying on an article, and treat no policy as pre-accepted by any authority.

The single most useful thing to know about arriving in Malaysia is that KLIA Terminal 1 and Terminal 2 are different buildings. They are linked by a shuttle train and by buses, and the transfer works well when you have planned for it. It goes badly when a full-service international arrival at Terminal 1 meets a separately ticketed low-cost departure from Terminal 2 with a short gap — you have to collect bags, clear immigration, move terminals, and check in again as a new passenger. That is a multi-hour sequence, not a connection.

Into the city, the express train from KLIA to KL Sentral is fast, fixed-schedule and serves both terminals, and it is the default choice for most arrivals. Airport coaches are less expensive and slower, and ride-hailing operates from designated pickup levels that differ by terminal. Taxis run on a coupon or app basis rather than open negotiation.

Internal travel deserves one specific note. Flying from the peninsula to Sabah or Sarawak means passing through immigration on arrival, because the Borneo states control their own entry. It is quick, but you need your passport in hand on what feels like a domestic flight.

Malaysia divides cleanly into things you can decide on the morning of, and things that were decided months ago by a permit system. Kuala Lumpur, Penang and Melaka belong to the first group almost entirely. Sabah's headline experiences belong firmly to the second.

If Sipadan or Kinabalu is the reason for the trip, build the itinerary around the permit date rather than the flight. If neither is, Malaysia is one of the easier countries in Asia to plan loosely.

Malaysia has operated a visa-free entry arrangement for Indian passport holders, with conditions attached to the length of stay and the supporting documents expected at the border. Schemes like this are announced with an end date and extended, revised or allowed to lapse, so the only safe approach is to check the position for your specific travel dates with the Immigration Department of Malaysia.

Whatever the visa position, Malaysia operates a digital arrival card that arriving travellers are generally expected to submit before entry. It is filed online through the immigration department's own system within a defined window before arrival, and it is separate from any visa. Exemptions exist and have been revised, so confirm on the department's own portal whether it applies to you — and file it there, because look-alike sites exist.

Border officers can ask for proof of onward travel, accommodation and funds, and Sabah and Sarawak apply their own entry control. Verify current rules before you book anything non-refundable; permission to travel is not admission.