What is Fiber internet? Everything about Fiber in Belgium.
How does Fiber internet work?
Fiber internet sends your data as pulses of light through ultra-thin optical Fiber instead of copper or coax cables. This gives you a faster, more stable connection, even when several people are online at the same time.
From pulses of light to internet traffic
Fiber internet works differently from traditional internet over copper. Instead of sending electrical signals through copper cables, Fiber-optic technology sends data as pulses of light through ultra-thin optical Fiber. This means data can travel incredibly fast with minimal loss of quality. Fiber also offers plenty of capacity in both directions, allowing for particularly high download and upload speeds.
That makes Fiber ideal for anything that uses a lot of bandwidth: working from home, video calls, gaming, high-quality streaming, cloud backups and uploading large files.
Fiber at Mobile Vikings: the Proximus network
With Mobile Vikings, you surf via the Proximus network. It’s an FTTH (Fiber to the Home) network, which means the Fiber-optic cable runs directly into your home. So you get a fast and stable Fiber connection, without the final stretch running over copper.
Fiber not available at your address yet? You can still rely on a solid VDSL connection over copper. Check your address to see which technology and speed are available at your home.
Fiber vs copper and coax: what are the differences?
The difference isn’t just download speed. Upload speed, latency and stability matter too. Coax and VDSL are perfectly fine for everyday use, while Fiber really shines when you want to get the most out of your internet connection.
Speed: download and upload compared
The differences between VDSL, coax and Fiber aren’t limited to internet speed. Upload speed, stability and latency differ too. Here’s how the three technologies compare.
| Criterion | Fiber | VDSL / Copper | Coax* |
|---|---|---|---|
| Download speed | up to 5 Gbps | 150 Mbps | up to 1 Gbps |
| Upload speed | up to 1 Gbps | 50 Mbps | up to 50 Mbps |
| Latency | very low and stable | higher | low |
| Stability | excellent (dedicated line) | good (depends on distance) | good (shared) |
| Price at Mobile Vikings | from € 40 | from € 40 | Not available |
* Mobile Vikings does not offer internet over coax. The speeds shown are based on standard subscriptions from Belgian providers.
Stability, latency and ping
Latency is the time it takes for data to travel from your device to the internet and back. Ping measures that delay. The lower they are, the more responsive your connection feels. This is particularly important for online gaming, video calls and other interactive applications.
- Coax (cable) uses a shared network. You share the available capacity with other users nearby, so performance may vary at busy times.
- VDSL (copper) uses the existing telephone line. Your speed depends on the distance between your home and the street cabinet: the longer the stretch of copper, the greater the chance of lower performance.
- Fiber (FTTH) doesn’t have those limitations. The Fiber-optic cable runs directly into your home, giving you a very stable connection, low latency and consistent ping, even when several people in your household are online at the same time.
When is Fiber better than copper or coax?
Fiber is particularly worthwhile if you use your internet intensively and expect high speeds, fast uploads and a stable connection. It’s a smart choice if you:
- Often work from home and regularly upload large files to cloud platforms such as SharePoint, Google Drive or Dropbox.
- Have several people online at the same time, for example gaming, streaming in 4K and making video calls without putting your connection under pressure.
- Want the most stable internet connection possible, with low latency and consistent performance, even at peak times.
- Want to be ready for the future, with a connection that can keep up with higher speeds and more connected devices.
Benefits of Fiber internet
High upload speeds
Future-proof and scalable
Great performance in both directions
When is Mobile Vikings less suitable?
Is Fiber not yet available at your address? Then Mobile Vikings Fiber isn’t the right fit for you just yet, simply because the infrastructure hasn’t reached your street. You can start with a reliable VDSL connection over copper at the same competitive price, and switch to Fiber as soon as it’s rolled out at your address.
Is Fiber available at my address?
The Fiber rollout is in full swing in Belgium. In 2026, Fiber coverage is estimated at 35 to 40%, with major cities and new-build neighbourhoods often connected first. The network is constantly expanding, however, giving more and more neighbourhoods access to Fiber.
Wondering whether you can already switch to Fiber? Use the Fiber internet checker. Enter your postcode and house number to find out straight away whether Fiber is available at your address and which internet speed you can get.
In short: Fiber internet at a glance
Fiber internet, also known as FTTH (Fiber to the Home), is an internet connection where a Fiber-optic cable runs directly into your home. Because data travels as pulses of light, Fiber offers higher speeds, lower latency and greater stability than VDSL. This makes Fiber ideal for working from home, video calls, online gaming, streaming and cloud storage. To find out whether Fiber is available at your address, simply use the Fiber internet checker.
Want superfast, stable internet at home too? Discover our Fiber subscriptions, compare the speeds and then check your address to see which plan is available to you.
Frequently asked questions
Is Fiber internet faster than copper?
Yes. Fiber offers higher download and upload speeds than VDSL over copper. You also get lower latency and a more stable connection, making Fiber particularly worthwhile for working from home, video calls, online gaming and cloud storage.
What is the difference between cable internet (coax) and Fiber?
Fiber and coax both offer high download speeds, but Fiber stands out for its upload speed, stability and latency. With FTTH, the Fiber-optic cable runs directly into your home, while coax uses a shared network. This makes Fiber better suited to intensive internet use.
What does FTTH mean?
FTTH stands for Fiber to the Home. It means the Fiber-optic cable runs directly into your home. This gives you all the benefits of a true Fiber-optic connection, including high speeds, low latency and a stable internet connection.
Is Fiber available at my address?
That depends on where you live. The Fiber rollout in Belgium is well underway, but availability varies from street to street and home to home. Use the Fiber internet checker to find out straight away whether FTTH is available at your address.
What happens if Fiber isn't available at my address yet?
If Fiber isn’t available yet, you can choose a reliable VDSL connection over copper with Mobile Vikings. Once FTTH becomes available at your address, you can easily switch to Fiber.