---
title: "Yealink Phone LCD Displays the Message No Service"
slug: "yealink-phone-lcd-displays-the-message-no-service"
updated: 2026-05-11T17:45:18Z
published: 2026-05-21T21:27:17Z
canonical: "help.8x8.com/yealink-phone-lcd-displays-the-message-no-service"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.8x8.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Yealink Phone LCD Displays the Message No Service

## Symptom

Yealink phone LCD display shows the message *No Service*. There is no dial tone, and you are unable to make or receive calls.

## Applies To

- Yealink Phones

## Resolution

### Power Cycle The Phone

In cases where the phone had been properly working for a long time and is only suddenly afflicted with these error messages, power cycling your network is often able to clear it up.

### Further network Troubleshooting

- Swap out the Ethernet cord connecting the phone to the network for a different one (to see if a faulty cord might be the issue).
- Is the phone connected to a wall jack? If so, try connecting it directly to a networking device (router or switch).
- If the phone is connected to a networking device, try plugging it into a different port on the device (to see if a faulty port is the issue).
- If accessible, review the firewall/router settings and be sure to disable the following:
  - SIP-ALG
  - SPI
  - Firewall
- You can also try setting a static IP on the phone, which has been known to help resolve these issues.

## Cause

Your phone is unable to successfully register a SIP account with our services.