Nepal is a budget-friendly country to stay connected, and getting a local SIM is part of the arrival ritual for most travelers. You can buy one the moment you land at Tribhuvan International Airport (KTM) in Kathmandu, and prices are very low. The big question for Nepal is not city coverage but how well your network performs on the trekking trails of the Himalayas.
Networks & coverage
Two operators matter: Ncell (private) and Nepal Telecom / NTC (state-owned). Ncell is the favourite for fast, reliable 4G in Kathmandu, Pokhara and Chitwan and is the easiest tourist SIM to buy. NTC, however, has the widest reach into the high mountains thanks to government infrastructure, and it is the better choice if you are heading to Everest Base Camp, the Annapurna Circuit or other remote regions where Ncell signal often fails. The country runs on 4G; coverage drops to 3G or disappears entirely at high altitude and in deep valleys. Many trekkers carry both SIMs for redundancy.
eSIM or physical SIM?
Ncell now sells a tourist eSIM, and global brands like Airalo, Nomad, Saily and Holafly all cover Nepal, so you can land already online. For the absolute cheapest connectivity, though, a physical SIM bought at the KTM airport counter or an Ncell/NTC shop is unbeatable, often just a dollar or two for the SIM plus a cheap data pack. Trekkers who want the strongest high-altitude coverage should buy a physical NTC SIM locally, since most travel eSIMs ride a single network (usually Ncell).
Data, calls & messaging
Travel eSIMs are data-only. Locals and travelers alike rely on apps for communication: WhatsApp, Facebook Messenger and Viber are all widely used in Nepal, and Instagram is hugely popular. Local physical SIMs typically bundle a small allowance of call minutes, which can be handy for booking guesthouses and trekking logistics. If you need to make local phone calls regularly, a physical Ncell or NTC SIM is the way to go.
How much data do you need?
For a city-based trip with maps, messaging and photo uploads, 5-10 GB over two to four weeks is comfortable. Trekkers actually use less data on the trail because connectivity is patchy, so a 5 GB pack often lasts a long expedition. Local tourist packs such as 10 GB for a week or 12 GB for six weeks are excellent value; reserve the larger unlimited-style eSIM plans for remote workers staying in Kathmandu or Pokhara.