An update that I think you guys will love to hear.
I couldn't wait for my original G4's repairs to complete. So I went to the store to see if I could ask for a replacement, and if I could, possibly switch phones to an LG V10 or XPERIA Z5.
They said I could, but if I wanted to switch to the V10 or Z5, I would have to pay part of the phone's price as my G4's current value will be deducted from the price of the new phone (50% of its original value). Yeah, no. Not gonna do that, so I decided to go with another G4.
This one has the brown leather back, is an unlocked H815 unit, runs Android 6.0 Marshmallow out of the box (THANKFULLY), S/N starts with 512 and, well, it's a G4.
Ran LG Backup on it, waited for about 30 minutes to get it to restore my backup I made on my SD card and after a quick reboot, the new G4 is working almost exactly like my old one, minus the bootloop.
So, I'm back with a G4! And she actually runs better than my last one.
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(If anyone asks about the Z5, I just wanted to give a Sony device a shot, though really, I'm still iffy about Sony's lackluster camera efforts on their phones)