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Luxembourg is one of Europe's smallest and wealthiest countries, sandwiched between Belgium, France, and Germany. Orange, POST, and Tango all provide 5G across the Grand Duchy, making it one of the best-covered small nations in Europe. Data is essential for the Mobilité app (Luxembourg's excellent free public transit — the entire country is fare-free), navigating the UNESCO Ville de Luxembourg fortifications, and accessing cross-border services since many Luxembourg residents and workers commute from neighboring countries.

All three carriers provide comprehensive 5G across Luxembourg City, Esch-sur-Alzette, Dudelange, Differdange, and the entire country. The Moselle wine valley on the eastern border with Germany has coverage throughout. The Ardennes region of northern Luxembourg (Vianden castle, Our River valley) has 4G along main roads.

Luxembourg City's Grund district (valley below the fortifications), the Chemin de la Corniche (dubbed Europe's most beautiful balcony), and the Grand Ducal Palace are all well covered. The MUDAM modern art museum and the Philharmonie Luxembourg have coverage.

Luxembourg introduced free public transit in 2020 — the first country in the world to do so. The Mobilité app is essential for planning all bus, tram, and train journeys. Trains also connect to Trier (Germany), Metz (France), and Brussels.

Luxembourg uses the Euro. It's expensive even by European standards — price comparison apps are useful. English, French, German, and Luxembourgish are all used. English works everywhere.