Telia, Bite and Tele2 cover cities and highways on 4G and 5G; dense forests near Dzūkija and remote lagoon villages can thin out briefly. Vilnius old town stays well served. Check the network list above for Lithuania before you fly; it shows what is available right now, including options such as Tele2, Bite, Omnitel.
There is no complicated Lithuania-only product to learn. NXTL is one global eSIM: the same profile you might use elsewhere works here on Tele2, Bite, Omnitel when listed. Land, turn data on, and go — rates for Lithuania are shown live on this page because they can change.
EU roaming applies for many visitors; others buy prepaid at Narvesen kiosks and operator shops with ID. Euro-priced data is affordable for weekend city breaks. That still makes sense if you will live in Vilnius for months and need local calls. For a holiday or short work trip, most people only need data — and NXTL gives you that without the desk stop: install at home, keep your usual number for calls and bank texts, pay only for the gigabytes you use.
If Lithuania is one stop on a longer route, NXTL is built for that. Use data around Vilnius and Kaunas, then keep the same balance wherever NXTL has coverage next. You are not locked into a single-country tourist pack.
Klaipėda–Nida ferry crosses the Curonian Lagoon where signal may switch between mainland and spit towers. NXTL is built for that kind of Lithuania trip: data when you need it, without buying a new pack for every change of plan.
Need more data mid-trip in Lithuania? Top up in the app. Finished early? Whatever you do not use stays available for later travel. That flexibility is the point of pay-as-you-go.