Love it tor.
Nice to see this rolling out
Waiting for all the people complaining about it having bugs though
You realise that this post is nearly 5 years old? Just use google find my phone.
Plug it in with the original charger and leave to charge for about an hour. Then attempt to boot into recovery by holding power + volume down
Have you seen the situation in China? you're going to have to be patient for a while.
In terms of battery drain please can you visit existing...
If that is still happening please factory reset the device and try again.
Try removing the app and installing again.
you'd be surprised... if it's still not working please raise a bug report here https://forums.oneplus.com/feedback/
Make sure your screen is clean and you're putting your full finger on the screen.
Try deleting your fingerprints from settings the re-register them
turning volume up or down doesn't change volume
Backup in cloud or on separate USB