Brand new member with a brand new Cosmo.
I am a bit confused here, because my efforts to get TWRP to boot on the Cosmo are unsuccessful.
I first attempted a "fastboot boot twrp.img" (because I generally avoid overwriting stock recovery unless I need to) and fastboot thinks everything went fine, but the Cosmo goes black screen, vibrates, pauses about three seconds, vibrates again, and then boots Android.
Okay, so I decided to use fastboot to flash the image and used "fastboot flash recovery twrp.img", and once again fastboot thinks everything worked fine, but now when I boot into recovery, I'm getting stock recovery.
So, last thing I knew to try, I flashed the recovery partition using SP Flash Tool, which again appears to have gone fine, and yet I am still getting stock recovery on the Cosmo.
Any hints what might be happening here?