Power off the phone > Press & HOLD the Power + Volume UP until you feel the phone vibrate > Release both buttons at the same time > wait a couple of seconds until you see the Recovery Menu > Use the Volume button to scroll down to "wipe cache" & Select with the Power button > Wait until the recovery menu defaults back to "Reboot now" & Select with the Power button.
Power off the phone > Press & HOLD the Power + Volume UP until you feel the phone vibrate > Release both buttons at the same time > wait a couple of seconds until you see the Recovery Menu > Use the Volume button to scroll down to "wipe cache" & Select with the Power button > Wait until the recovery menu defaults back to "Reboot now" & Select with the Power button.
Turn off the device. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key. When the Android logo displays, release all three keys. An 'Installing system update' message will show for 30 - 60 seconds before the Android system recovery menu options appear. Press the Volume down key several times to highlight wipe cache partition. Press Power key to select. Press the Volume down key to highlight yes, them and press the Power key to select. When the wipe cache partition is complete, Reboot system now is highlighted. Press the Power key to restart the device.
Bixby button is not required to boot the A71 into Recovery.
You only need to press & HOLD the Power & Volume UP buttons until the phone vibrates & then simultaneously release both.
I can't imagine any device taking 30 to 60 seconds until the Recovery Menu is displayed.. Maybe 5 seconds max. On devices I've had, the Recovery Menu is displayed almost instantly.
