Getting "Downloading... Do not turn off target!" when trying to boot into recovery mode I just installed Cyanogenmod on my Samsung Galaxy S2. I want to
install Google Services app ZIP. For that I have to reboot the phone in recovery mode. But it is only showing


  Downloading... Do not turn off target!


What should be done?
You have rebooted to Download Mode by mistake. You needed to reboot to recovery mode. To do that, follow these steps:


Press the Power button until the phone reboots normally.
Switch off the phone as normal.
When the phone has been switched off, press Power and Volume Up together until the Samsung logo displays, then release.


Alternative:


Reboot to system
Find the "Advanced Power Menu" option under phone customization settings, and enable it.
Press the Power button to get the power menu, and choose "Reboot &rarr; Reboot to Recovery".


That's it. I think you have a custom recovery installed and can find your way about it.

Edit:

So you don't have a custom recovery installed and have the stock recovery. I have no idea how you installed Cyanogenmod without a custom recovery (so please include the process of how you did it in your question), maybe through ODIN? If so, flashing a custom recovery like CWM or TWRP is similar in process to the way you flashed CWM/TWRP. I'll point you to a guide on how to do this here.