iPhone with full storage stuck on apple logo/bootloop

I'm opening this discussion because I couldn't reply to any older question even when I have this solution or workaround.

SOLUTION [NO FLASH/NO UPDATE/NO 3RD PARTY SW]

My procedure: I had boot loop because of full storage. I simply kept my iPhone booting again and again (about 20 hours) until low battery screen. Then I tried to start my iPhone like 10-15 times to show low battery screen to drain it more. Then I put it on charger. After a few minutes iPhone tried to load but it got into boot loop again. During the process I tried hard reset several times but boot loop was still present. After about 10 minutes I removed the charger to drain it again and viola, after about one more hour my iPhone welcomed me with strange gong and my normal lock screen (and with 2% battery)! I didn't touch the screen and connected my iPhone to my computer to back up and then, when connected, I unlocked it without any problem. All apps were black without icons but everything got back to normal after restart. All data saved! Hope this helps someone :)