Originally Posted by exad
to reboot to recovery:
Press and hold Power and volume Up until the phone shuts off
When the screen shuts off, let go of power/volume up and press and hold volume down until bootloader comes up.
I bet you get a lot of thanks button for xda hits because of this issue,huh? Thank you,the same thing happened to me and luckily I was home and plugged it up to my computer and luckily got adb reboot recovery to get me out of it. Hopefully I won't need this again but thanks for the info if I do.😎