Help and support for
Samsung Galaxy S21

Android 11.0

Change the device

Most viewed guides

Restart your phone

Improve battery life

Change ringtone

Sell your Samsung Galaxy S21 up to

£62.00*

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Connectivity and network on your Samsung Galaxy S21

Setup and first use

Contacts and messaging

Connectivity and network

Troubleshooting

I can't use my phone's internet connection

I can't use WiFi

I can't use my phone as a WiFi hotspot

My phone uses a large amount of mobile data

Network settings

Change network mode

Turn airplane mode on or off

Internet and WiFi

Set up your phone for internet

Connect to a WiFi network

Use hotspot on your phone

Turn automatic use of mobile data on or off

Data usage

Check data usage

Turn mobile data on or off

Turn roaming on or off

Bluetooth

Connect to a Bluetooth device

GPS

Turn GPS on or off

Backup and synchronisation

Back up pictures and videos to Google Drive

Sync content automatically

Transfer files between computer and phone