Help and support for
Samsung Galaxy S21 Ultra

Android 11.0

Change the device

Most viewed guides

Restart your phone

Improve battery life

Change ringtone

Sell your Samsung Galaxy S21 Ultra up to

£100.00*

*The final value depends on the condition of the device.

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Basic settings on your Samsung Galaxy S21 Ultra

Setup and first use

Contacts and messaging

Connectivity and network

Troubleshooting

I can't receive messages on my voicemail

I can't check my voicemail

I can't use WiFi Calling

My phone's battery life is short

I can't make voice calls

I can't receive voice calls

Calls and voicemail

Turn call waiting on or off

Turn your own caller ID on or off

Turn call barring on or off

Turn WiFi Calling on or off

Save voicemail number

Set up voicemail

Cancel all diverts

App management

Install apps from Google Play

Use music player

Turn automatic app updates on or off

Clear your cache

Battery usage

Improve battery life

Restart

Restart your phone

Update and restoring factory settings

Update your phone

Factory reset your phone