---
title: FTU
slug: Glossary/FTU
tags:
  - FTU
  - Firefox OS
  - First time use
  - Gaia
  - Glossary
  - Infrastructure
  - Intro
---
FTU (First Time Use) is the app that loads when you run a newly-installed version of {{glossary("Gecko")}} on a {{glossary("Firefox OS")}} device.

You can use FTU to set many important options (e.g. timezone, WiFi details, default language, importing contacts), or take the "Phone Tour" to find out more about your device.
