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

£104.00*

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

Thinking about upgrading?

Find your trade-in value and save on an upgrade.

Set up and first use of your Samsung Galaxy S21 Ultra

Setup and first use

Contacts and messaging

Connectivity and network

Troubleshooting

I can't turn on my phone

I can't start my phone

First steps

Turn your phone on and off

Charge your phone

Transfer content from another phone

Activate Google account on your phone

Security settings

Turn SIM lock on or off

Turn the lock code on or off

Sound and screen settings

Change ringtone

Turn silent mode on or off

Set date and time on your phone

Turn notifications on or off

Screenshot on your phone

eSIM

Transfer eSIM to your Samsung phone

Activate eSIM on your Samsung phone using a QR code