Swisscom slow internet in Switzerland: tests, evidence and complaints

If your Swisscom connection is slow or unreliable, start with these equipment checks. Then document a repeatable result and ask for a specific investigation.

Applies to: Internet-Box 5 Pro, Internet-Box 5, Internet-Box 4 and Internet-Box 3 with the current web portal (Internet-Box 5 Pro firmware 15.20.46; menus as of 2026). The portal and Swisscom’s help are available in English.Checked: 3 November 2026

When this helps

  • You use Swisscom in Switzerland.
  • 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.

  1. Look at the status LED. Steady white means everything is working.

  2. Flashing red means no internet connection; check the cables. Steady red is an error, so switch the box off and on.

  3. Steady blue (after the first ten minutes of installation) means the Internet-Box is faulty and needs exchanging.

  4. In My Swisscom, check your connection and run Smart Support for a specific fault.

  5. Check www.swisscom.ch/status for current faults and maintenance work.

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.

  1. Compare a wired connection to the router with Wi-Fi on the same device.

  2. Repeat the same test server during the slowdown and at a quieter time.

  3. Record download, upload, latency and whether another household device was using the connection.

How to complain to Swisscom

Use Swisscom’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 Switzerland service contract before escalating. Use the national regulator’s consumer guidance for your service.

Your local escalation route

Try to resolve the dispute with the provider before requesting ombudscom conciliation. Check admissibility and the current processing fee.

Swiss telecom conciliation 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

Checked on 3 November 2026.