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The three networks
Luxembourg has three companies that operate their own mobile network: POST Luxembourg, the historic state-owned operator; Tango, owned by Proximus; and Orange Luxembourg. A handful of smaller brands, such as Luxembourg Online (LOL Mobile) and Eltrona, resell capacity on one of these networks rather than running their own infrastructure. In practice this means coverage is similar across most providers in the city and along main roads, and the differences that matter are price, contract terms and customer service language.
POST has traditionally had the widest physical network and the most shops, useful if you prefer to sort things out in person rather than online. Tango and Orange both sell contract-free plans as standard, which suits newcomers who are not yet sure how long they will stay or want to avoid a 12-month commitment. All three operators, and most resellers, offer service in English online and in their shops in Luxembourg City, though written correspondence for some administrative matters may default to French or German.
Shops for all three operators are easy to find in Luxembourg City, including around the Gare and Ville Haute quarters, and staff are used to dealing with new arrivals who need a working number within the hour. If you land outside opening hours, most operators also let you order online and pick up the SIM later, or have it delivered to your first address once you have one.
Prepaid or contract
For the first weeks in Luxembourg, a prepaid (pay-as-you-go) SIM is usually the simplest option. You buy the SIM in a shop or online, top it up with a card or app, and there is no commitment or credit check. It is a sensible choice before you have a Luxembourg bank account, since most contract plans are paid by direct debit, ideally from a Luxembourg IBAN.
Contract plans (abonnements) generally offer more data and calling minutes for the price, and are worth switching to once you are settled and have opened a bank account. Some contracts run for 12 months, while Tango and Orange both advertise no-commitment monthly plans that can be cancelled at any time, which is a reasonable middle ground for someone still finding their feet. Family or multi-line discounts exist with all three operators, worth asking about if you are relocating as a couple or with a family and want to set up several numbers at once.
What ID you need
Since 2017, Luxembourg has required identification for anyone buying a SIM card with a Luxembourg number, prepaid or not. In practice this means bringing your passport or national ID card to the shop, or uploading a copy when you order online. For a prepaid SIM you generally do not need a Luxembourg address yet. For a contract plan, the operator will also ask for proof of address and, for the direct debit, your IBAN, so this step tends to happen naturally once you have registered with your commune and opened a bank account.
Roaming inside the EU
Luxembourg is a member of the EU's "Roam Like at Home" scheme, so a Luxembourg SIM works in the rest of the EU and the wider EEA at no extra cost, within the limits of your plan's fair-use policy for data. This matters more than it might elsewhere: Luxembourg borders France, Belgium and Germany, and many residents cross for weekend trips, shopping or family visits. Outside the EU/EEA, standard roaming charges and data caps apply, so check your operator's conditions before travelling further afield, particularly for data.
Coverage near the borders
Because the country is small and its three neighbours are close, phones in border areas sometimes pick up a stronger signal from a French, Belgian or German mast rather than a Luxembourg one. Thanks to the EU roaming rules this is not normally a cost problem, since you are still billed at domestic rates while roaming within the EU. If you want to be certain which network you are on, most phones let you switch from automatic to manual network selection in the settings, which can also help if you notice unexpectedly poor reception near a border.
This is especially relevant if you live in a quarter close to the edge of the city, or in one of the communes around Luxembourg City, where a cross-border signal is more likely to appear as the default. It rarely causes a practical problem for calls or messages, and mainly matters if you are trying to diagnose a coverage gap at a specific address before signing a lease.
Porting your existing number
If you already have a mobile number, whether Luxembourgish or from elsewhere, ask your new operator about number porting when you sign up; in Luxembourg this is normally handled entirely by the new operator and takes a matter of days rather than weeks. A foreign number cannot simply be transferred into the Luxembourg numbering system, since porting only works between operators within the same country, but you can usually keep your old SIM active as a secondary number for as long as you need it, which is worth doing during the transition so you do not miss calls from family or clients back home.
5G and choosing a plan
All three networks have rolled out 5G, and recent Luxembourg-bought phones support it by default, so coverage is rarely a deciding factor between operators in and around the city. What varies more is the amount of data included, whether EU data is bundled at the same allowance as domestic data, and whether the plan includes any allowance for calls outside the EU, which some newcomers with family further afield value highly. Because plans and prices change often, compare current offers on each operator's own site, or on an independent comparison site, before committing, rather than relying on a headline price you saw when researching the move.
Home internet is a separate contract from a mobile plan, and the same three operators, plus a few dedicated internet providers, compete for fibre and broadband customers in Luxembourg City. Our guide to setting up utilities and internet covers that side of getting connected once you have signed a lease.
Our take
Getting a SIM is one of the easiest parts of settling in Luxembourg, and it is worth doing on day one so you have a working number for the commune, your bank and your new employer. Start with a prepaid SIM if you are not yet fully settled, bring your passport, and move to a contract once you have an address and an IBAN. If you are still choosing where to live, browse our current listings or contact us and we can help you plan the practical side of the move alongside the property search.
Sources
This article gives general practical information and is not legal or tax advice. Procedures, amounts and deadlines change; check the current rules on guichet.lu or with the administration concerned.
