I just try the Cyanogenmod 12.1 Nightly and and my android version is now 5.1.1, whenever I try to go to Recovery Mode, it only shows the Samsung screen for a seconds (but sometimes twice) and then the Cyanogenmod booth screen. I'm doing the right thing (Volume Up, Home button and Power button at the same time) but no Recovery Mode showing. Please help, I really need to install GAPPS :(
--SAMSUNG GALAXY S2
adb reboot recovery
?