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Help and support for
Samsung Galaxy S21 Ultra

Android 11.0
Samsung Galaxy S21 Ultra

Most viewed guides

Change network
Check data usage
Factory reset your phone
Turn mobile data on or off
Insert SIM and battery

Connectivity and network on your Samsung Galaxy S21 Ultra

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
Change network mode
Turn airplane mode on or off
Use dual SIM

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