Proximus slow internet in Belgium: tests, evidence and complaints
If your Proximus connection is slow or unreliable, start with these equipment checks. Then document a repeatable result and ask for a specific investigation.
When this helps
- You use Proximus in Belgium.
- Your connection is slower than expected, drops out or performs badly at certain times.
Check your Internet Box
These checks apply to Internet Box. Check the model before following its menus.
Check the lights on the front. Internet/broadband and Wi-Fi should stay lit.
In the Proximus app, go to Products and scroll down to Performance test.
Tap Start to test the speed of your device’s connection.
Or run the speed test on
proximus.beand read the tips below it.
Separate the service from your home Wi-Fi
For the exact settings and supported equipment, see the Internet Box guide.
Do not factory-reset the equipment as a first step. A reset can erase service settings and interrupt phone service.
Compare a wired connection to the router with Wi-Fi on the same device.
Repeat the same test server during the slowdown and at a quieter time.
Record download, upload, latency and whether another household device was using the connection.
How to complain to Proximus
Use Proximus’s official support to report the fault. Request a formal complaint reference if it remains unresolved.
Include the plan wording, dates, test conditions, previous references and the specific outcome you want. Ask for a written response.
Check the complaints procedure in your Belgium service contract before escalating. Use the national regulator’s consumer guidance for your service.
Your local escalation route
Contact the operator first. The telecom ombudsman accepts complaints after you have already tried to resolve the issue with the operator.
Belgian telecom ombudsman lists the conditions and application route.
Collect the evidence with Kilobat
On a Mac, Kilobat can record connection checks and produce a support report. Review the report and add your test conditions before sharing.
The basic report export is free. Kilobat Pro’s complaint wizard helps assemble your evidence, impact and requested resolution into a draft you review and send.
Measurements cover this Mac while monitoring ran. They cannot prove whole-home uptime, establish provider fault or replace a required official measurement procedure.
Sources
- Proximus: Password for your b-box/Internet Box and your internet connection
- Proximus: Port forwarding on your b-box or Internet Box
- Proximus: How to restart your devices for Internet and TV?
- Proximus: Restart your Proximus devices (Internet Box+ 7 and fibre modem)
- Proximus: Reset your b-box/Internet Box
- Proximus: Manage your Wi-Fi with the app
- Proximus: Some devices can’t connect to Wi-Fi with an Internet Box
- Proximus: Your Internet Box and Wi-Fi Booster v2
- Proximus: Test your internet speed
- Proximus: Connect to Wi-Fi, network name and password
- Belgian telecom ombudsman
Checked on 3 November 2026.