Complete Unresponsive Iphone 11

I updated to ios 15 public beta 5 this morning, it worked perfectly till evening, and when I tried to turn on the screen it wasn't responsive at all.

I tried plugging it into the power source and also tried the volume up -> volume down -> hold power combination but my iPhone is not responding. It's just 2 months old

What is the solution here?

Have you tried to reboot it ?

Have the same problem here. Literally just happened few minutes ago. Can't reboot. The iPhone is turning it self on and off. Blinking. Apple Log, then off, on, Apple logo, then off.

@Roy_Good from what  shaikhalid posted, seems he/she has tried most of what is described here. Did you too? https://support.apple.com/en-us/HT201412

I can get it to restore mode. Only issue is if I click restore, it takes my phone back to iOS 14. Meaning I will lose all iOS15 back ups. Any other alternative?

Complete Unresponsive Iphone 11
 
 
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