Three UK slow internet in United Kingdom: tests, evidence and complaints

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

Applies to: Three 5G Hub NR5103E V2 (Zyxel), from Three’s device guides as of 2026, with the Three app for iOS and Android. Three’s guides for the older NR5103E and for its ZTE and Green Packet hubs differ.Checked: 3 November 2026

When this helps

  • You use Three UK in United Kingdom.
  • Your connection is slower than expected, drops out or performs badly at certain times.

Check your Three 5G Hub

These checks apply to Three 5G Hub. Check the model before following its menus.

  1. Open the Three app; the home screen shows the hub’s signal strength.

  2. Move the hub and watch the signal to find the best place for it.

  3. For data usage, sign in at http://192.168.1.1 with the admin password and select Tools.

  4. For an outage, check Three’s Coverage Checker or Network Status Checker.

Separate the service from your home Wi-Fi

For the exact settings and supported equipment, see the Three 5G Hub 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 Three UK

Use Three UK’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.

For the local escalation route and conditions, follow the United Kingdom complaint guide.

Public data: complaints reported to Ofcom

Ofcom publishes provider comparisons for fixed broadband complaints. Use the same reporting period and service category when comparing providers.

Complaints reaching the regulator are different from all complaints made to a provider. They do not measure the speed or reliability of your individual line.

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.