trying to get out of a reboot
black screen with white apple logo. continually rebooting. have tried hard reset. Not working. trying everything before going to the restore step
Question marked as
Try the steps in this article:
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
Specifically, you can try the update first, if that does not work you need to try the restore.
If that does not help your phone might need service:
Contact Apple for support and service - Apple Support
Good luck!