How do I reset my smartphone?

A factory reset erases all local data. Back up photos and accounts first. The option is usually under System → Reset — follow the brand guide carefully.

How do I change the system language?

Under System → Languages & input, or General → Language & Region. Some apps may restart after the change.

System & Settings

System & Settings: Guides & tips

System updates, language, date/time and core settings — stay in control of your operating system.

185 guides across brands

Top guides

The most popular guides for System & Settings

OppoColoros 11

Guides by brand

Grouped automatically — pick a brand above or scroll the directory.

System guides for Samsung

29 guides

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System guides for Xiaomi

30 guides (of 37)

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System guides for Android

17 guides

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System guides for Huawei

30 guides (of 33)

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System guides for OnePlus

23 guides

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System guides for Oppo

23 guides

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System guides for Realme

23 guides

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FAQ about System & Settings

Frequently asked questions

Go to Settings → System / Software update. Use a stable Wi‑Fi connection and charge the battery first. Some brands roll updates out in stages.

System & Settings: Guides & tips

Top guides

Turn Off Developer Options

Turn On/Off USB Debugging

Change the Region in Settings

Change the Default Browser App

Navigation Button Order

Switch Between Navigation Buttons and Gestures

Enable Developer Options

Write System Settings: App Access

Guides by brand

FAQ about System & Settings

Frequently asked questions