Galaxy Flip

Boot Samsung Galaxy Z Flip 4 into Recovery using ADB command

   First of all, make sure you have installed Samsung Galaxy Z Flip 4 USB Driver and ADB and Fastboot Drivers on your Windows PC.
   Enable "USB Debugging" on your phone from Developer Options. If Developer Options is missing; go to Settings > About Phone and tap on Build Number for about 7-10 times.
   Connect your device to PC and open Command Prompt (CMD).
   Enter the below command to boot Samsung Galaxy Z Flip 4 into Recovery Mode.

   adb reboot recovery