Originally Posted by spitfireatz
tried it again several time, but as I said it doesn't work.
I get a black screen (not the CM animation) and than reboot all over again.
You are mostly likely not performing the button combo correctly. If there were no bootloader (hboot), the screen would not be coming on at all. Not getting into bootloader is almost always a case of not doing the button combo correctly. The one possible exception, is if your volume rocker has failed (and simply not registering the vol down being pressed).
Make sure you hold vol down, and do not let go
until the while bootloader screen comes up.
Recovery is a different story, as you can indeed not have recovery installed, and the phone will still function. But hboot and recovery are 2 different things.
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Phone: HTC One X (AT&T version) Rooted, Bootloader Unlocked, S-Off
Tablet: Samsung Galaxy Note 8 (WiFi only) Rooted