I bought a used LG D802 from a shop and found that its case and software says it is LG-D802 running sotware version D80220c. But when I looked up its IMEI I found it is D800 AT&T. Now the problem is that what should I do to update it to Lollipop. LG Mobile support tool says software is up to date .
If I want to flash through kdz which kdz should I use? Please guide me

I actually quite like the app (except for the fact that it sends a long text into separate messages, unlike textra that kept it all together. ) It's fast and I like how they implemented quick reply. This may be the first time that I've wanted to keep the stock messenger app rather than trash it. So how many of you guys kept the stock app or did you end up replacing it with your favorite?

Guys i need fast help if possible :( !!
Everything was fine with my GN, but after i pulled the battery to check the serial number , after i tried to turn it on the phone is not able anymore to end the boot process :(!!! i tried to do 3 wipe and reflash rom+gapps but it didn't work!
Me and my girlfriend have the gn and we bought it 2 years and half ago. Her battery died 5 days ago! is it possible that the same is happening to me?? but even if the battery is not good anymore why the phone remain on the boot animation??