How to switch your mobile operator in Luxembourg in 2026: complete guide with number portability
Switching mobile operators in Luxembourg is simple, free and governed by law. Number portability is a right guaranteed by the ILR (Institut Luxembourgeois de Régulation): you keep your number regardless of your new operator, at no cost, in under 10 working days in most cases. This guide walks you through every step, covers all scenarios (with or without contract, with or without portability, physical SIM or eSIM), and highlights the key points to watch out for a smooth, hassle-free switch.
Find your next mobile plan before switching
Compare all offers from POST, Tango, Orange, Eltrona and Luxembourg Online — updated in real time. No sign-up, no commitment required.
Compare mobile plans →Before switching operators: checking your contract situation
The first step, before taking any action, is to know exactly where you stand contractually. This determines whether you can leave freely or whether fees may apply.
Are you still under a minimum contract term?
A 12 or 24-month minimum contract is typically linked to a subsidised smartphone purchase. To check your situation:
- Review your original contract or the summary provided at sign-up
- Log in to your online customer account (MyPost, MyTango, Orange customer area, etc.)
- Call the customer service of your current operator
Your operator is legally required to inform you at least one month before the end of your contract term of the expiry date and the cancellation terms. This right is guaranteed by the Luxembourg Electronic Communications Act of 17 December 2021.
The four possible contract situations
| Situation | Freedom to switch | Potential fees |
|---|---|---|
| No minimum term or term expired | Full freedom — switch whenever you like | No cancellation fees |
| Active minimum contract term | Possible, but fees may apply | Remaining monthly fees (see section 5) |
| Operator has modified the contract | Fee-free cancellation within 1 month | None (legal right) |
| Prepaid SIM card | Full freedom — portability possible | No cancellation fees |
Source: MyILR — Mobile contract cancellation · Luxembourg Electronic Communications Act, 17 December 2021 (Legilux)
Contract modification by your operator: if your operator modifies the contractual terms to your detriment (price increase, data reduction, etc.), you have one month from the notification to cancel free of charge, even during a minimum contract period. This right is expressly provided for by Luxembourg law.
The mobile operator switching process in 5 steps
Here is the complete process for switching operators while keeping your Luxembourg number. This is the option chosen by the vast majority: number portability is free and entirely managed by your new operator.
Identify the offer that suits you with the new operator. Our comparison tool lets you filter by budget, data volume, contract length and network. Check the subscription conditions (required documents, eSIM or physical SIM availability).
Your new operator will need your ICCID number — the 19-20 digit serial number on your current SIM card. See the dedicated section below.
Tick the « keep my current number » option when subscribing. You will need to provide: your current phone number, your current operator’s name, your ICCID and your preferred portability date (at least 5 working days after ordering in practice).
Your new operator sends your SIM (or activates your eSIM). A temporary number is immediately activated — you can use the new network while your old number stays active on your old SIM.
On the agreed date, your number migrates to the new SIM. You receive a notification by SMS or email. Your old SIM becomes inactive. Remove it from your phone.
Key legal point: a validated portability request with the new operator automatically counts as a cancellation request to your old operator. You do not need to send a separate cancellation letter to your current operator — the new operator handles everything. Note: this does not release you from any outstanding contractual commitments (early termination fees if applicable).
Finding your ICCID number: the key to portability
The ICCID (Integrated Circuit Card Identifier) is the unique 19-20 digit serial number on your SIM card. It is required to initiate a portability request in Luxembourg.
For eSIM: the eSIM ICCID is found in Settings → General → About → scroll to the eSIM profile (iPhone). eSIM ICCIDs typically start with « 8988 ». See our full guide on eSIM in Luxembourg.
Never share your ICCID via unsecured email or on suspicious forms. Only provide it to the official subscription service of your new operator.
Timelines and service continuity: what to expect
The ILR sets strict deadlines for portability operations in Luxembourg. In practice, the process is designed to be transparent and uninterrupted.
| Step | Maximum legal deadline | Typical timeline |
|---|---|---|
| Actual number porting | 1 working day once all conditions are met | Carried out on the agreed date |
| From order to number switch | Not capped by law | 5 to 10 working days |
| Maximum service interruption | 1 working day | A few hours at most |
Source: ILR — Mobile number portability (ilr.lu)
The transition is designed to be seamless: as soon as you receive your new SIM, you can use it with a temporary number. Your old SIM remains active until the switch. Both numbers work in parallel during the transition period — you are never cut off.
If the portability is not carried out as agreed — unusual delay, extended service outage or processing error — you can claim compensation from your operator. In case of unresolved disputes, the ILR offers a free mediation service at myilr.lu.
Switching while under contract: your options and applicable fees
Being under a minimum contract term does not prevent you from switching operators — it may simply result in fees, except in situations provided for by Luxembourg law.
Early termination fees in Luxembourg
According to the rules in force in Luxembourg and information from the European Consumer Centre (CEC) Luxembourg:
- For a 12-month commitment: early termination generally requires paying all remaining monthly fees until the end of the contract
- For a 24-month commitment: from month 13 onwards, the early termination fee is legally capped at one quarter of the sums remaining due until the end of the contract
Plan at €40/month · Cancellation at month 15 (9 months remaining)
Remaining sum = 9 × €40 = €360
Legal cap (¼) = €360 ÷ 4 = maximum €90
Net gain calculation:
Savings with new plan: €15/month × 9 months = €135
Early termination fee: €90
Net gain by switching now: €45 — worth it.
Source: CEC Luxembourg — Mobile subscription cancellation · Luxembourg Electronic Communications Act (Legilux)
Cases where you can leave without fees even under contract
Cancellation with fees
- Switching for personal convenience
- Cancellation during the initial contract period
- Fees = remaining monthly payments (capped at ¼ from month 13 for 24-month contracts)
Fee-free cancellation
- Operator modifies contract terms (price, services)
- Operator fails to meet contractual obligations
- Death of the contract holder
- Proven force majeure
Switching operators without keeping your number
If you want to switch operator and change number at the same time, the process is even simpler — there is no technical coordination required between the two operators.
Critical point: if your number is linked to critical services — two-factor authentication (2FA) for your bank, Luxtrust account, guichet.lu services, professional accounts, online subscriptions — update these services before your old number is deactivated. Once the old line is closed, you will no longer receive SMS sent to that number.
After cancelling your contract, you retain the right to port your number to another operator for at least one month after the effective cancellation date (unless you expressly waive this right). If you cancelled without porting your number, it may not be too late.
Portability and eSIM: everything you need to know
Portability works exactly the same way with an eSIM as with a physical SIM — your rights are identical. The difference is purely technical. For a full overview of compatible offers, see our guide on eSIM in Luxembourg.
Physical SIM → eSIM
- You provide the ICCID of your current physical SIM
- The new operator activates an eSIM profile on your phone
- Your number switches to the eSIM on the agreed date
- The physical SIM becomes inactive — remove it from your phone
eSIM → physical SIM or another eSIM
- You provide the ICCID of your current eSIM
- The switch may require an extra step in your phone’s network settings
- POST and Tango provide specific procedures for iPhone eSIM profile switching
- Check your new operator’s instructions before the switching date
Source: Orange Luxembourg — Portability and ICCID · Tango — Operator switching procedure
After the switch: steps not to forget
Once portability is finalised and your number is active on the new network, a few checks are in order.
Verify the closure of your old contract
Confirm that your old operator has received and processed the cancellation. Check your final bill for any unexpected charges. If you spot anything suspicious, contact your old operator’s customer service first, then the ILR if needed.
| Service to update | Priority | Action required |
|---|---|---|
| Banking 2FA | Critical | Update number BEFORE old line is closed |
| Luxtrust / guichet.lu | Critical | Update number BEFORE old line is closed |
| Google / Apple ID accounts | High | Update in security settings |
| Social media and professional services | High | Check account recovery settings |
| Personal and professional contacts | Normal | Notify by message — only if you changed number |
Note: only applicable if you changed number. If you kept your number through portability, no updates are needed on these services.
Test coverage in your usual areas
In the first days after switching, test network quality at home, at work and on your daily routes. If coverage proves insufficient, you can switch again — especially if your new plan has no minimum term. Check our guide on mobile network coverage in Luxembourg and the ILR’s official maps to compare operators.
Common mistakes to avoid when switching operators
Mistake #1 — Cancelling your current contract BEFORE requesting portability: this is the most serious error. If you cancel your current contract before requesting portability with the new operator, you risk permanently losing your number. The correct procedure: ALWAYS request portability with the new operator first — this step automatically triggers cancellation with the old operator.
Mistake #2 — Not checking if your phone is SIM-unlocked: a phone purchased through your current operator may be network-locked. Check before subscribing with a new operator. In practice, virtually all Luxembourg operators sell factory-unlocked devices or offer free unlocking after the contract period.
Mistake #3 — Overlooking critical services linked to your number: if your number is linked to 2FA for your bank or Luxtrust, plan ahead. During the switch, SMS may be temporarily disrupted. Avoid scheduling a switch on the day of an important banking or administrative transaction.
Even in Luxembourg, coverage differences between operators can be significant in rural areas and certain valleys. Check coverage at your exact address on the ILR’s maps (web.ilr.lu) before committing. If in doubt, choose a no-contract plan.
Many people don’t know that after cancelling their contract, they have at least one month to still port their number. If you cancelled without thinking about portability, it may not be too late.
You now know how to switch — find your next plan
Our comparison tool helps you identify the best offer available in Luxembourg based on your budget, usage and coverage area. No sign-up required, instant results.
Frequently asked questions about switching operators in Luxembourg
How long does switching mobile operators take in Luxembourg?
The maximum legal deadline for number porting is 1 working day once all conditions are met. In practice, the time from your order to your number being active with the new operator is 5 to 10 working days. During this time you can already use your new SIM with a temporary number. There is no service interruption.
Is number portability free in Luxembourg?
Yes, completely free. The ILR guarantees that no direct fee related to portability can be charged to the consumer. Neither your old nor your new operator can charge you for keeping your number when switching. Any early termination fees (if under contract) are separate from portability itself.
Can I switch operators if I am still under a minimum contract?
Yes, you can always switch even under a minimum contract. Early termination fees may apply: for a 24-month contract, the fee is capped at one quarter of remaining sums from month 13 onwards. Some situations allow fee-free exit (operator modifying terms, etc.). See myilr.lu for full details.
Which mobile operators can I switch between in Luxembourg?
Luxembourg’s network operators are POST Telecom, Tango (Proximus group) and Orange Luxembourg. Eltrona and Luxembourg Online also offer mobile plans as MVNOs (virtual operators). Portability is available between all these operators. Compare their offers in our Luxembourg mobile operators guide.
What information do I need to provide to the new operator for portability?
Three elements are required: (1) your current phone number to be ported, (2) the name of your current operator (POST, Tango, Orange, Eltrona or Luxembourg Online), (3) your ICCID number (19-20 digits — in Settings → General → About on iPhone, in Settings → About on Android, or on the back of your SIM). Some operators also ask for a preferred portability date, with a minimum of 5 working days from ordering.