Liechtenstein has one domestic operator, FL1 (Telecom Liechtenstein), but also relies heavily on roaming agreements with Swiss operators like Swisscom, Salt, and Sunrise. HelloRoam eSIM plans connect via partner networks with 4G LTE across the country.
Liechtenstein is only 160 square kilometers and runs north to south along the Rhine Valley between Switzerland and Austria. Vaduz, the capital, has excellent 4G throughout the city center, the castle area, and main streets. Schaan, Balzers, Triesen, and Eschen all have solid 4G.
The alpine ski areas in the Malbun valley have 4G at the resort base and most of the ski runs. Higher peaks in the Rätikon mountains can have weaker signal. The Rhine Valley floor and all main roads have consistent coverage. Given the country's small size, even the most rural corners are within a few kilometers of a covered settlement.