Mobile data speed in Luxembourg 2026: real 4G and 5G speeds by operator, speed test tools and consumer rights
Luxembourg has one of the best-performing mobile networks in Europe, with 5G capable of reaching up to 1.5 Gbit/s in the best-covered areas. But your actual connection speed depends on many factors: your operator, the technology in use (4G or 5G), your location and network load at peak hours. This guide analyses real mobile speeds in Luxembourg by technology and operator, explains what influences your speed, and presents the official tools to test your connection and exercise your rights.
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Compare plans →Theoretical 4G and 5G speeds in Luxembourg
The mobile technology in use (4G, 4G+ or 5G) sets the theoretical ceiling for achievable speeds. Here are the reference figures communicated by Luxembourg operators and official bodies.
4G and 4G+ (LTE and LTE-Advanced)
4G+ (LTE-Advanced) is the dominant mobile technology in Luxembourg for areas outside 5G coverage:
- Theoretical download speed: up to 150 Mbit/s on standard 4G, up to 300 Mbit/s on 4G+ (carrier aggregation)
- Theoretical upload speed: 50 to 75 Mbit/s
- Latency: 20 to 50 ms under normal conditions
5G in Luxembourg
5G has been deployed in Luxembourg since October 2020, using two frequency bands with very different characteristics:
| Frequency band | Range | Typical speed | Best use case |
|---|---|---|---|
| 700 MHz (low frequency) | Excellent — good indoor penetration | 100–250 Mbit/s | Wide coverage, rural areas |
| 3,600 MHz (mid-band) | Limited — dense urban areas | Up to 1.5 Gbit/s | Very high speeds in city centres |
Source: POST Luxembourg — 5G in Luxembourg · ILR communications on 5G frequency allocation (2020)
Maximum 5G speeds announced by Luxembourg operators: POST communicates tiers of 225 Mbit/s, 500 Mbit/s, 1 Gbit/s and 1.5 Gbit/s depending on zone and plan. Tango distinguishes 5G « Fast » (250 Mbit/s) and 5G « Max » (up to 1.5 Gbit/s). Orange reaches up to 1.5 Gbit/s in its 3.6 GHz-covered areas — Orange holds the largest 3.6 GHz allocation in Luxembourg (110 MHz).
Theoretical speed ≠ real speed. The 1.5 Gbit/s figures are maximum values measured under optimal conditions (close to antenna, low network load, compatible device). In everyday use, actual speeds are significantly lower. The next section explains why.
Real vs theoretical speeds: the inevitable gap
One of the most misunderstood topics in mobile telephony is the gap between the theoretical speeds operators advertise and what you actually get day to day. This gap is unavoidable and normal.
What 5G in Luxembourg actually delivers
The 5G currently deployed in Luxembourg is NSA (Non-Standalone): it still relies on the existing 4G core network for certain functions. The maximum real speeds achievable are around 1.5 Gbit/s under the best conditions. In field measurements (nPerf, SpeedGEO), average measured mobile speeds are around 100–150 Mbit/s for POST, the top-rated operator.
An antenna is shared by all active users within its coverage radius. The more simultaneous users, the lower the per-user speed — congestion is especially noticeable at peak hours (8–9am, 12–2pm, 6–8pm).
The further you are from the antenna, or the more obstacles between you and it (buildings, terrain, dense vegetation), the weaker the signal and the lower the speed — especially on high frequencies (3.6 GHz).
Your phone automatically connects to the most suitable available band. On 700 MHz, range is excellent but speed is capped. On 3.6 GHz, speed is highest but range is limited.
Maximum 5G speeds require a recent smartphone with a 5G modem compatible with the bands used in Luxembourg. Check your model’s specifications.
The city paradox: in densely populated towns like Esch-sur-Alzette, median speeds can sometimes be lower than in less populous areas — because far more users share the same antennas simultaneously. Optimal coverage does not always guarantee optimal speed.
Speeds by operator in Luxembourg: comparison of available data
Several independent tools regularly measure real mobile speeds in Luxembourg. Here is a summary of available data — with the associated methodological caveats.
SpeedGEO (2025, user measurements): POST Luxembourg leads for mobile internet with an average download speed of 148.7 Mbit/s and a ping of 28 ms, based on real user tests in live conditions.
nPerf (field coverage maps): POST’s 5G reaches 1 Gbit/s across Luxembourg City centre (Cloche d’Or, Merl, Bel-Air, Kirchberg, Cents…). Tango also reaches 1 Gbit/s peaks in the capital’s centre and at certain points along the French border. Orange reaches 1 Gbit/s in the historic centre and the station district.
connect Magazin / umlaut — « Best in Test » 2024: POST Luxembourg won the title of best mobile network in Luxembourg for the third consecutive year in 2024.
| Operator | Avg download speed | Max 5G speed (nPerf field) | Distinctions |
|---|---|---|---|
| POST | ~148 Mbit/s (SpeedGEO 2025) | 1 Gbit/s (LU-City and surroundings) | Best in Test 2024, ILR best 5G coverage |
| Tango | Partial data available | 1 Gbit/s (LU-City centre + FR border) | Good coverage along Belgian border |
| Orange | Partial data available | 1 Gbit/s (historic centre + station) | Largest 3.6 GHz allocation (110 MHz) |
| Eltrona (POST MVNO) | Same as POST (shared infrastructure) | Same as POST | nPerf 2025 medal for fixed network |
| LOL Mobile | Limited data | Deployment ongoing | ILR 5G licence 2020 |
Sources: SpeedGEO — Luxembourg mobile internet statistics 2025 · nPerf — Luxembourg mobile speed map
Methodological caveats: speed rankings vary depending on the tool used (SpeedGEO, nPerf, Ookla), the measurement period, the geographic area covered and the number of tests. No ranking can claim absolute objectivity. Check recent measurements directly on nperf.com and checkmynet.lu for your specific area.
Factors that affect your mobile speed in Luxembourg
Understanding these factors lets you diagnose a problem, optimise your connection, or choose the operator best suited to your location.
Network-related factors
| Factor | Impact on speed | What you can do |
|---|---|---|
| Available technology (4G/5G) | Determines the achievable ceiling | Check coverage on myilr.lu |
| Network congestion (peak hours) | High — can reduce speed by 3 to 5x | Schedule heavy downloads outside peak hours |
| Distance from antenna | Progressive — degrades with distance | Move to a better-covered area |
| Obstacles (buildings, terrain) | Significant especially at 3.6 GHz | Move closer to a window indoors |
Source: MyILR — Mobile service quality and speed
Device-related factors
- 5G compatibility: a non-5G smartphone cannot benefit from 5G speeds, even in a covered area
- Modem model: recent high-end smartphones have more capable 5G modems supporting more frequency bands
- Power saving mode: some smartphones reduce radio performance to preserve battery
- Background applications: active updates or syncs reduce available speed for your main usage
When travelling at speed: in a car on a motorway or on a train, your phone must frequently switch between antennas (handover). These transitions can temporarily reduce speeds and connection stability — this is normal and independent of the operator.
How to test your mobile speed in Luxembourg
Several tools are available for reliable mobile speed measurement. For relevant results in Luxembourg, these are the recommended options.
checkmynet.lu (ILR) — Recommended
Official Luxembourg tool — free
The ILR’s official tool, available at checkmynet.lu and as a mobile app (Android and iOS). Measures over 150 parameters: download speed, upload speed, ping and quality of service (QoS). Servers are located at the national internet exchange point (LU-CIX), guaranteeing operator-neutral measurements. Available in FR, DE, EN and LU. Geolocated results can be used as evidence with your operator or the ILR.
nPerf — Interactive speed maps
Field measurements by users — free
nPerf provides interactive mobile speed maps based on real user measurements in the field. Useful for comparing measured speeds by technology and operator, and for visualising areas with high or degraded performance. Available at nperf.com and as an app.
Speedtest.net (Ookla)
International reference — free
International reference for speed testing. Note that some Luxembourg operators do not appear consistently in Ookla’s statistics, which can create gaps in comparisons based on this tool for the Luxembourg market.
Best practices for reliable measurements
- Run the test on mobile data (disable Wi-Fi if testing your mobile connection)
- Close background apps before testing
- Repeat tests at different times of day — speeds vary with network load
- Test in multiple locations to understand geographic variability
- Note the technology in use at the time of the test (4G or 5G) — shown in your phone’s network settings
A single test at a single moment is not sufficient to diagnose a speed issue. The ILR recommends running multiple measurements at different times and locations before contacting your operator or filing a complaint.
checkmynet.lu: the ILR’s official speed measurement tool
checkmynet.lu is the measurement tool developed by the ILR (Institut Luxembourgeois de Régulation). Launched in 2018 and regularly updated, it has recorded nearly 450,000 measurements over five years, 13% of which were on mobile networks.
What checkmynet.lu measures
How to use checkmynet.lu
- Visit checkmynet.lu or download the app on Android or iOS
- Make sure you are connected on mobile data (disable Wi-Fi to test your mobile connection)
- Start the test and wait for results (approximately 30 to 60 seconds)
- Check your results — download speed, upload, ping — with the associated colour code (green / orange / red)
- Results are saved in a history log and displayed on a geographic map
checkmynet.lu is operator-independent: its measurement servers are located at the national internet exchange point (LU-CIX), which guarantees measurements that neither favour nor disadvantage any particular operator. This is its key advantage over operators’ own proprietary testing tools.
Your rights if your mobile speed is insufficient in Luxembourg
In Luxembourg, operators have a legal obligation to communicate actual upload and download speeds in their contractual documents and on their websites. If your measured speed is significantly and persistently below what is stated in your contract, you have recourse.
Use checkmynet.lu to run multiple tests at different times and locations. Keep the results — they serve as evidence with your operator and the ILR.
In case of a persistent gap, contact your operator in writing (email or letter), explaining the issue and attaching your checkmynet measurements. Allow approximately two weeks for a response.
If the operator does not respond or the response is unsatisfactory, use the ILR’s free mediation service at myilr.lu.
Important nuance for mobile: speed variability is inherently greater on mobile than on fixed fibre. Location, number of simultaneous users and available technology mean mobile speeds fluctuate naturally. A « persistent gap » is assessed over time and in light of this inherent variability — a single unfavourable test does not constitute a contractual breach.
checkmynet measurements across 10 tests (varied times and locations): 18, 22, 31, 25, 19, 28, 21, 24, 20, 23 Mbit/s
Average measured: ~23 Mbit/s — 77% below the advertised contractual speed
→ Documented persistent gap: contacting operator justified, then ILR if needed
How much mobile speed do you need for your usage?
Speed determines the smoothness of all your everyday mobile activities. Here are the minimum speeds generally recommended for the main use cases.
| Usage | Minimum speed | Comfortable speed | Sufficient technology |
|---|---|---|---|
| WhatsApp, SMS, emails | 1 Mbit/s | 5 Mbit/s | 3G / 4G |
| Web browsing | 5 Mbit/s | 20 Mbit/s | 4G |
| HD video streaming (720p) | 5 Mbit/s | 10 Mbit/s | 4G |
| Full HD video streaming (1080p) | 8 Mbit/s | 15 Mbit/s | 4G+ |
| 4K video streaming | 25 Mbit/s | 50 Mbit/s | 4G+ / 5G |
| Video calls (Zoom, Teams) | 5 Mbit/s | 15 Mbit/s | 4G+ |
| Online mobile gaming | 10 Mbit/s + latency <30 ms | 30 Mbit/s + <15 ms | 4G+ / 5G |
| Heavy downloads (files, apps) | 10 Mbit/s | 100+ Mbit/s | 4G+ / 5G |
Reference thresholds: Netflix, Google, Microsoft Teams and operator recommendations.
In practice, 4G+ available in Luxembourg (with real-world speeds generally above 30 Mbit/s in most covered areas) is sufficient for the vast majority of everyday mobile uses. 5G brings the most benefit for heavy downloads, intensive simultaneous usage, or when the network is heavily loaded.
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Frequently asked questions about mobile speeds in Luxembourg
Which operator offers the best mobile speed in Luxembourg?
Based on available independent data for 2026, POST Luxembourg leads with an average download speed of around 148 Mbit/s (SpeedGEO 2025), the top 5G coverage ranking from the ILR, and the « Best in Test » award from connect Magazin/umlaut in 2024. Eltrona Mobile subscribers benefit from the same POST infrastructure. Tango and Orange also offer 5G speeds up to 1 Gbit/s in Luxembourg City centre. Compare operators in our Luxembourg mobile operators guide.
What is the maximum 5G speed in Luxembourg?
5G in Luxembourg can reach up to 1.5 Gbit/s in the best conditions (close to a 3.6 GHz antenna, low network load, latest-generation device). In daily use, speeds range between 100 Mbit/s and 1 Gbit/s depending on the area. nPerf measurements document peaks of 1 Gbit/s in Luxembourg City centre for POST, Tango and Orange. These are peak values — the actual average speed is significantly lower.
How do I test my mobile speed in Luxembourg?
The recommended official tool is checkmynet.lu, developed by the ILR. Available on the web or as a mobile app (Android and iOS), it measures download speed, upload speed and ping. Disable Wi-Fi before testing to measure your mobile connection. Run multiple tests at different times and locations for a reliable diagnosis. nPerf also provides useful field measurements for comparing operators.
My mobile speed is slow in Luxembourg — what should I do?
Start by running multiple checkmynet.lu tests at different times and locations. If speeds are consistently well below what your contract states: contact your operator in writing attaching your checkmynet results (they carry evidential weight with the ILR). If the response is unsatisfactory, use the ILR’s free mediation service at myilr.lu. If the issue is location-specific, check coverage at your address on myilr.lu — it may be in a poorly covered zone.
Is 5G really faster than 4G in Luxembourg?
Yes, but the difference depends heavily on your situation. In dense 5G areas (Luxembourg City centre, major urban areas), 5G delivers significantly higher speeds — up to ten times faster in the best cases. In areas covered only by the 700 MHz band (long-range 5G), the speed gain over 4G+ is more modest. For most everyday uses, 4G+ is generally sufficient in Luxembourg. 5G brings real benefits for heavy downloads and when the network is congested.
My plan says « 5G » but I don’t have a 5G connection — why?
Several explanations are possible: your smartphone may not be 5G-compatible (check your model’s specifications), you may not be in an area covered by your operator’s 5G (check on myilr.lu or your operator’s coverage map), or your phone may automatically switch to 4G because the 5G signal is too weak at your location. « 5G » in a plan means you can access 5G when in a covered area with a compatible device — not that you benefit from it permanently everywhere.