Asus zenfone selfie in boot loop. USB debugging off. Std recovery mode accessible. No data backup. Anyway to recover data?
I've had the same problem. I've installed TWRP using the instructions here (but the files I downloaded were others; pay attention to your phone version, model, etc).

After booting on TWRP your files can be accessed using your PC normally, so you can do your backup, reflash your boot.img (look for it online, follow instructions on the same website I sent) and do a factory reset via recovery mode.

Hope it helps you and other people online.