Be prepared, I get rather long winded.
If you were on the most current 4.05.605.14 with S-on which based on what you list as the radios and hboot is what it appears you were on, then you are in a difficult spot. The really bad news is the only RUU you would be able to use is the 4.05.605.14 and no one has admitted to being able to get ahold of. The most current one available is 3.14.605.12 but that is useless to you. You would have to S-off to go back to stock but would have to have a working rom to do it. It's not impossible but it aint easy. I just had to do it about a month ago when I was trying to S-off my replacement Rezound. It came with the most current stock ROM and I didn't bother reading up on the current ControlBear method. In the past, you had to have a rooted rom in order to S-off. So of course, I unlocked the bootloader, flashed AmonRa 3.15 and then used superuser to root it and then went about trying to S-off. I couldn't find my previous windows based versions of ControlBear so I went about making a live cd ubunto disk and trying to S-off. It wouldn't work. Then I read the unlimited.io site instructions and found that the current version needs the unrooted stock rom to succeed. I really never paid attention to unrooting before because if I had to do it, I could always just run the factory wipe and root would be gone but not this time. It kept showing that I was rooted. So I tried wiping data, cache, dalvik cache, and after that didn't work, I wiped the system. Very bad move on my part. Now I couldn't get past the bootloader. I thought I was done for because I knew with S-on, there was no going back and the global rom RUU was still not available.
After trying all kinds of things I ended up
1. downloading the 4.05.605.14 stock rooted rom listed HERE
(Thanks MicroMod777) in the Rezound Development section.
2. Then downloaded the current firmware.zip from HERE
(Thanks Flyhalf205) and then extracted the recovery.img along with the hboot .nb0 file from it.
3. I then created 2 separate custom ph98img.zip for each so I could always reinstall the stock hboot and the stock recovery.img.
4. I extracted the boot.img from the rooted rom and flashed that first. I don't remember if I did it via adb in fastboot usb or with another ph98img.zip and then
5. I made sure that my bootloader was unlocked and then installed AmonRa as the recovery
6. Then used AmonRa to flash the stock rooted zip file. I then wiped the cache 3 times and the dalkvik cache 3 times.
I let the phone reboot and I was back to a working phone.!!! Then I found out that it was rooted with SuperSu which gives you the option of doing a full permanent unroot which I did. I then put that ph98img that I had made that had the stock recovery.img on it and flashed that in the bootloader. After rebooting I now had a fully stock phone and proceeded to do the S-off. I left the bootloader unlocked as directed by the unlimited.io site. I had limited experience with ubunto but found THIS PAGE
that helped walk me through it. I followed it exactly and ended up with an S-off phone. One thing that wasn't clear to me was how to open a terminal in ubunto but I figured that out after trial and error. IIRC, I clicked on the home tab on the left and then in the search box, typed terminal. The first icon that was shown was a terminal emulator and I used that for the commands.
Now I still wasn't finished. I ended up relocking the bootloader but didn't like the relocked and tampered flags that were showing. So I ended up running the most recent RUU (3.14.605.12 found HERE
and I now had a ***LOCKED*** bootloader and then let the phone reboot. After it rebooted, I hit the home key and bypassed the setup. I then got into settings and then into software update and let it update. It did a small update and then had to repeat the reboot, bypass setup, and software update. This time it did the global update. I let it reboot but this time, I ran the setup. Once I was up and running, I again went into bootloader and reinstalled AmonRa and used the 3.16 version and made sure to do a nandroid before doing anything further. After that, I got ahold of SuperSu 1.51 and flashed that in the AmonRa recovery. I now had a ***LOCKED*** stock rooted Rezound and several nandroid backups of both fully stock and rooted. Which turned out to be a great idea because not even 3 weeks later after this, the phone started malfunctioning (power button) and a problem with the camera so it got replaced and I had to put it back fully stock. I was already setup for this. I unrooted, put the stock recovery back on, and made it S-on. When the replacement came, I immediately unlocked it, did the S-off (only took one try), relocked, ruu'd back to 3.14.605.12, updated to global rom, flashed AmonRa, and restored with my most recent rooted nandroid. and I am back up and running a whole lot sooner...
I hope this helps.