I have a really old Samsung Galaxy Grand Duos from 5 years back.
I want to boot into download mode using ADB. I am using the following command
adb -s <deviceid> reboot download
What this does is just reboot my phone and does not take me to recovery. I can boot into recovery though using
adb reboot recovery
I have tried the commands
adb reboot bootloader
also has no effect other than booting my phone.
I can enter into recovery the manual way using
volume down + power + home button, but why can't I enter it using ADB ?
What am I doing wrong ?
My phone is running Jellybean Samsung Stock ROM and does not have the fastboot/bootloader mode.