Brussels runs on Proximus, Orange Belgium and Base, and your eSIM rides one of them as its host. Coverage across the city is complete and 4G is fast everywhere. The one genuine quirk is 5G, and it is a legal quirk rather than a technical one, which makes Brussels unusual among Western European capitals. The other thing to know is that this city speaks two languages officially and neither of them is the one on the map you are reading.
This is the practical thing that catches people, and it is not a matter of politeness. It changes what you see on signs.
Brussels is officially bilingual, French and Dutch, and everything inside the region is signed in both. Beyond the city limits it stops: Flanders is Dutch-only on its signage, Wallonia is French-only, and neither region translates for the other.
Place names change completely, not partially. Mons is Bergen. Liege is Luik. Antwerpen is Anvers. Brussels itself is Bruxelles and Brussel. Bruges is Brugge, and Gent is Gand.
This matters most at railway stations. A departure board in Flanders lists the Dutch name only. A train to Bergen is the train to Mons, and if you are looking for Mons you will watch it leave.
Set your maps app and check both names for anywhere you are travelling to. The two names are frequently not similar enough to guess.
Within Brussels itself, French is the majority working language and English is very widely spoken, particularly around the EU quarter. Nobody will mind which you use. Just do not assume that a name you learned in one language will appear in the other.
An unusual one, and worth a paragraph because visitors notice the difference.
The Brussels-Capital Region set some of the strictest electromagnetic radiation limits in Europe, far below the international guideline levels that most countries adopt. The rule long predates 5G and was written into regional law.
That norm made a full 5G rollout legally difficult. A 5G pilot was halted in 2019, and the region spent years negotiating a revision while the rest of Belgium moved ahead. Parliament finally raised the ceiling in 2023, from 6 V/m to about 14.6 V/m outdoors, and 5G went live that September.
It is still the strictest limit in Belgium, and still well below what the WHO and ICNIRP consider safe, so Brussels continues to trail comparable capitals on 5G coverage.
In practice you will not suffer. 4G here is quick and universal, and everything a traveller does works perfectly well on it. It is simply worth knowing why the indicator on your phone looks different here than it did in Amsterdam an hour up the line.
Belgium runs its own domestic card scheme, Bancontact, and it is the default everywhere.
Some smaller merchants accept Bancontact only - bakeries, market stalls, a few bars and friteries. A foreign Visa or Mastercard will simply be declined, and the terminal will not explain why.
Payconiq is the associated phone app and increasingly the way locals pay.
Carry some cash for exactly these cases. Card acceptance is otherwise excellent and contactless is standard.
The road tunnels. Brussels drove a remarkable amount of its traffic underground in the mid-twentieth century, and the tunnel network under the inner city is extensive. Signal drops in several of them, which matters if you are navigating by phone while driving.
The metro is covered, so the underground rail is not the problem the road tunnels are.
The EU quarter buildings are deep and heavily glazed and some interiors are poor.
The Ardennes, an hour and a half southeast, behave like proper hills: coverage follows the valleys and the villages and thins across the forest and the plateaus.
The coast is fine, though Belgian mobile signal near the French and Dutch borders will occasionally hand you to a foreign network. Inside the EU that costs nothing, but it can confuse a data-usage display.
- STIB-MIVB, for the Brussels metro, tram and bus network, and the app carries both language versions.
- SNCB-NMBS for national rail, which is the way to reach Bruges, Ghent and Antwerp, all of which are under an hour.
- Maps, with the place-name caveat above firmly in mind.
- A translation app, more for reading signage than for speaking to anyone.
- A weather app, used constantly by locals, because the rain here is genuinely unpredictable rather than seasonal.
Brussels Airport (BRU) at Zaventem is about 12 km northeast, with a train from beneath the terminal reaching the central stations in around 20 minutes. It is fast, frequent and the obvious choice.
Brussels South Charleroi (CRL) is a different proposition: roughly 55 km away in Wallonia, served by low-cost networks, and connected by a dedicated coach that takes about an hour to Brussels-Midi. It is perfectly usable, but budget the transfer time and the extra fare into any fare comparison, because the cheap flight is often not cheaper once you have.
Brussels-Midi / Brussel-Zuid is the international rail station, with Eurostar services to London, Paris, Amsterdam and Cologne. For much of Western Europe the train beats flying from here comfortably, and the station is fifteen minutes from the Grand-Place.
Very little. The city is small, walkable in its centre, and wifi is everywhere including on much of the transport. A light plan covers maps, transport apps and messaging. Increase it only if you are working from cafes or making day trips into the countryside.
Assume rain, in any month. Not heavy, usually, but frequent and unannounced. A waterproof jacket with a hood beats an umbrella in the wind.
Layers. The maritime climate means a grey 12C morning can become a bright 20C afternoon and go back again.
Shoes for wet cobbles. The Grand-Place and the old centre are cobbled and slick when it rains, which is often.
Something smarter for dinner. Brussels dresses moderately well and its restaurant culture is serious.
Winter needs a proper coat but rarely anything extreme; hard freezes are uncommon.
The Grand-Place at night, when the guildhall facades are lit and the gold catches. It is genuinely one of the great squares in Europe and photographs better after dark.
The Atomium, the nine-sphere structure from the 1958 World's Fair, from the Boulevard du Centenaire approach.
Galeries Royales Saint-Hubert, the glass-vaulted shopping arcade from 1847, which predates most of the famous ones elsewhere.
Mont des Arts, looking down the formal garden to the spire of the Town Hall.
The comic strip murals, of which there are more than fifty scattered across the centre, mapped and walkable.
Parc du Cinquantenaire and its triumphal arch.
The Sablon on a weekend, for the antiques market and the church.
Manneken Pis, which you should see mostly so that you can find out how small he is. Manage expectations; the costume wardrobe in the museum is more interesting than the statue.
Belgium is the comic strip capital of the world. Tintin, the Smurfs, Lucky Luke and Spirou are all Belgian, and the medium is treated as a serious art form here rather than a children's one.
The saxophone was invented by a Belgian, Adolphe Sax, born in Dinant.
The Atomium is an iron crystal magnified about 165 billion times, which is a strange thing for a national monument to be.
Chips are Belgian, not French, and Belgians will explain this at length. The proper form is a paper cone from a friterie, fried twice, with a sauce you choose from a list of about twenty.
Belgium once went 541 days without a federal government and functioned essentially normally, which took the world record off Iraq and is a source of considerable local amusement. The regions and communities kept running throughout, which is rather the point.
Manneken Pis has a wardrobe of more than a thousand costumes and is dressed for occasions on a published schedule.
And "Brusselization" is a real term in urban planning, coined for what happened here: the demolition of historic districts for office blocks in the postwar decades. The city is still living with it, which explains the abrupt changes of register as you walk.
The Flower Carpet, in mid-August of even-numbered years, when the Grand-Place is covered with around a million begonias in a designed pattern for four days.
Ommegang, in July, a Renaissance procession in the Grand-Place dating from 1549.
Winter Wonders, from late November to early January, the Christmas market spread across the centre with a light show on the Grand-Place.
The Zinneke Parade, a biennial street parade that is deliberately the opposite of the formal ones.
Belgian National Day, 21 July, with a military parade and fireworks.
Brussels Jazz Weekend in May, which is free and fills the squares.
The love: Brussels is a working city rather than a display case, and it rewards people who stay long enough to find its pattern. The Grand-Place is spectacular, the art nouveau architecture is world-class and largely unvisited, the food is excellent from the friterie up to the very top, the beer culture is unmatched anywhere, and the whole country is small enough that Bruges, Ghent and Antwerp are all easy day trips. It is also genuinely multilingual and unpretentious about it.
The complaints are consistent. The weather is grey and visitors on a short trip can get four wet days in a row. The architecture is uneven, with fine buildings interrupted by dour offices, which is Brusselization in action. The EU quarter is lifeless outside working hours. Manneken Pis disappoints almost everyone. It can feel scruffy in places compared with Amsterdam or Vienna. And some find it administratively cold, a city of institutions where the visitor is not the point.
Give it three days rather than one, walk the comic mural route, eat chips properly, and take the train to Ghent on the greyest morning.
The Brussels-Capital Region has long enforced electromagnetic radiation limits far stricter than international guidelines, which made a full 5G deployment legally difficult for years and stopped a pilot in 2019. Parliament raised the ceiling in 2023 and 5G went live that September, but the limit is still the strictest in Belgium and the city trails comparable capitals. 4G is fast and universal, so it makes little practical difference.
Either French or Dutch is officially correct in Brussels, and English is very widely spoken. The real issue is not speaking but reading: outside the city, Flanders signs only in Dutch and Wallonia only in French, and place names differ completely between them. Mons is Bergen, Liege is Luik, Antwerp is Antwerpen or Anvers.
Belgium's domestic card scheme is Bancontact, and some smaller merchants accept only that. A foreign Visa or Mastercard will be refused without explanation. Carry cash for bakeries, friteries and market stalls.
Yes, unusually so. Bruges, Ghent and Antwerp are all under an hour by train from Brussels-Midi, and Eurostar reaches London, Paris and Amsterdam directly. The country is small enough that almost nothing needs an internal flight.
