A few days ago I needed to flash my S20 to Samsung’s Android R release candidate to do some compatibility testing.
The guides I found on the internet help but all seem to rely on timing, pressing and releasing buttons on the right moment when the device is restarting. I noticed an easier way of getting into download mode:
- Disconnect the S20 from USB cable
- Shutdown the S20
- Press volume up and down buttons simultaneously and keep pressing them while performing the next step
- Connect the S20 to the computer through USB
- Release the volume buttons when the download screen appears
That is it! Now you can follow the instructions on the screen to flash your device.