---
title: "DIGI slow internet in Spain: tests, evidence and complaints · Kilobat Guides"
url: "https://kilobat.app/guides/digi-router-slow-internet-complaint"
description: "DIGI internet slow or dropping out in Spain? Check equipment, compare tests, keep evidence and follow the complaint route."
---

# DIGI slow internet in Spain: tests, evidence and complaints

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

Applies to: ZTE ZXHN F6705 and H3600 as supplied by DIGI Spain, from DIGI’s 2025 user manuals; the F8648P and H3600P use the same ZTE interface. DIGI also hands out TP-Link, Zyxel, Huawei, Comtrend and other models, each with its own manual on DIGI’s guides page. Labels are given in Spanish with an English gloss. · Checked: 3 November 2026

## When this helps

- You use DIGI in Spain.
- Your connection is slower than expected, drops out or performs badly at certain times.

## Check your DIGI router

These checks apply to DIGI router. Check the model before following its menus.

1. Check the **Internet** light; steady means connected, and red on the H3600 means the router failed to get an IP.
2. On the F6705, a steady or flashing red **LOS** light means a fibre signal problem.
3. Sign in; the main screen shows the WAN connection and connected devices.
4. Run DIGI’s [speed test](https://www.digimobil.es/test-de-velocidad) to check your line speed.

## Separate the service from your home Wi-Fi

For the exact settings and supported equipment, see [the DIGI router guide](https://kilobat.app/routers/digi-router).

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 DIGI

Use [DIGI’s official support](https://www.digimobil.es/downloads/manual-zte-zxhn-f6705) 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 Spain service contract before escalating. Use the national regulator’s consumer guidance for your service.

## Your local escalation route

Complain to the operator first. If its answer is unsatisfactory or no answer arrives within one month, check the telecom-user office’s procedure.

The office states a three-month submission deadline from the operator’s response or the end of its one-month response period.

[Spain’s telecom-user complaint office](https://usuariosteleco.digital.gob.es/te-interesa/preguntas-frecuentes?faq=%27Reclamaciones%27) 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](https://kilobat.app/internet-complaint) 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

- [DIGI: Manual de usuario ZTE ZXHN F6705](https://www.digimobil.es/downloads/manual-zte-zxhn-f6705)
- [DIGI: Manual de usuario ZTE H3600](https://www.digimobil.es/downloads/manual-zyxel-zte-zxhn-h3600)
- [DIGI: Guía rápida de instalación ZTE H3600](https://www.digimobil.es/downloads/guia-zyxel-zte-zxhn-h3600)
- [DIGI: Guía para la apertura de puertos ZTE](https://www.digimobil.es/downloads/guia-apertura-puertos-zte)
- [DIGI: Preguntas frecuentes, Fibra (CG-NAT, router settings, own router)](https://www.digimobil.es/preguntas-frecuentes/fibra)
- [DIGI: Servicios adicionales (Conexión Plus, NEO WIFI)](https://www.digimobil.es/servicios-adicionales)
- [DIGI: Guías de usuario](https://www.digimobil.es/guias)
- [Spain’s telecom-user complaint office](https://usuariosteleco.digital.gob.es/te-interesa/preguntas-frecuentes?faq=%27Reclamaciones%27)

Checked on 3 November 2026.

## Related guides

- [Internet slower than advertised? Test it before you complain](https://kilobat.app/guides/internet-slower-than-advertised): A low speed test is a starting point.
- [Wi-Fi slow but Ethernet fast? Find the wireless bottleneck](https://kilobat.app/guides/wifi-slow-ethernet-fast): If the same device is consistently faster on Ethernet, investigate the wireless path first.
- [Slow internet complaint letter: a template with the evidence to attach](https://kilobat.app/guides/broadband-complaint-letter): A useful complaint says what happened, how you tested it and what you want the provider to do next.