If you truly have a d800, which sounds likely, the imei check may still show a d802 because it's a check of what was most recently flashed to the phone. I think it most likely scans the build.prop to get that info. So it may give you a true indication of what's on the phone BUT you still may in fact have a d800. It's my belief that the scammers flash a system.img from a d802 onto a phone which has d800 internals. They they slap a new d802 cover on the phone to make it look legit.
If you do in fact have a d800 (internals), then it will give you errors when trying to flash a d800 tot because it's recognizing the d802 system files which were flashed there by the scammer and it's associating that with being a d802. So you'll get a wrong model error from LG Flash Tools. The way around that is to hexedit a D800 tot so the model number and firmware version both read d802. Then LG Flash Tools will allow it to flash so you end up with a d800 tot being flashed onto your d800 phone. If using linux, use whatever hex editor you want. I prefer Bless. If using Windows,
THIS hex editor has been working for people.
What you do is open the tot with a hex editor. Then search for "lg-d800". Typically the line you need to edit is the first instance that comes up in the search. What you should see on that line is the model number and the firmware version. So for example it may read similar to:
LG-D800 D80020c
You then hex edit both instances of D800 to D802. Change only those 2 things. Then save and exit. After that, the tot should flash in LG Flash Tools.
Please realize you will now have D800 firmware on the phone and you are not an AT&T customer so you won't be able to update via OTA. The only tot we have for the D800 is a Jellybean version firmware so you'll either have to hope a newer tot becomes available in the future, or try to flash a custom rom. The only issue there is that some newer roms MAY require certain components of KitKat to work properly, such as the modem, etc which you don't have access to. So you may be limited in what you can do, not sure.
The ideal solution is to return the phone or file a claim on a seller if you bought on amazon, ebay, etc. That can involve high international shipping costs to many who run a D802 however. So you end up caught in a bad situation no matter how you proceed if that describes your situation. Sorry if that's the case for you. These phony D802's have become a serious epidemic. I'd guess at this point that the majority of used D802's being sold on auction sites and even on Amazon are not true D802's. We're seeing people in this situation almost every day now.
