HTC Dumlock is a workaround for devices with HTC's unlock that cannot flash boot from recovery. Put simply, we make backups of recovery and boot, then we flash the backup of recovery to boot. When you reboot normally, you'll be in your recovery, but since your recovery is flashed to boot, you can make changes to boot. Head on over to our website for download links and instructions.
NOTE: The Rezound does not have TWRP, so you will be using the universal version!
New v2 version scans / compares the backups of boot and recovery to help ensure that you don't run it twice and wipe out your backup of boot.