[LeEco Le Max 2 Questions & Answers] abufrejoval:
I believe the lower sticker won't help you much

I have the sticker for my phone and photos from the boxes of both. The upper part is just IMEI information, which is replicated on the boxes.

For the lower sticker my guess that it's regulatory sticker showing permission to use the phone in China: Mine has the exact same number at the top (model, I guess) and a different one at the bottom (individual for tracking, taxes whatever).

The only addition bit of information on the box is a production date, but only exact to the month and year: Both were produced in July 2016 and if I remember correctly, even the ones for the in-laws were produced in during that month.

My serial number starts with LP24288D62 and the 288 vs 888 could just reflect the color, rose gold (mine) vs. gold gold (yours).

My son's phone (4/32 in silver) has a serial that starts like this: LP02447BD62.

I asked him to ask his girl friend and her father if they wanted their phones upgraded to a current Mokee Nougat (they are on Mokee Marshmallow, but those updates ran dry some months ago), so if they agree I should be able to add two more samples, even if they are all 4/32 models but with some rose sprinkled in.

For me the cincher to buying this phone was availability of a CM custom ROM and root. Didn't read carefully enough to notice that initially for lack of source *real* CM support wasn't actually there.... but got lucky eventually. So I never really bothered much with the original ROMs, which were quite horrible with all that LeTV gobbledygook and without a Play store (only part of Google I like to have on my phone).

So I admit, that I never carefully tracked bootloader appearance or what ROMs exactly were on the phones: I just put TWRP and CM on them as quickly as I could and they all worked fully until Marchmallow support ran out.

Camera on le Max has never been really great, but I don't use it that much nor worry too much about quality. Indoors was hardly ever good, certainly not better than my Note 3, which it bested on paper, only. Outdoor shots were none too bad, especially in the sun (Texas September noons). But even shots in Estonia during October were still ok (very different latitude an inclination).

Videos could be terribly out of focus and I'd never know, because the display had no chance against the sun. Often they were just fine and some of them had annoing and regular focus pumping in them.

Nobody ever recommended le Max for its camera qualities and I am a bit surprised that there is such a quality spread given that both the sensor and the SoC are generally the same on many phones. Software must make a difference and I'm surprised it's so bad on le Max, but that's not what I bought it for.

Didn't even note the Nougat camera issues until weeks into the update and reading about it on the forum.

Going back to a 5.9.026S Stock ROM (the latest?) sure fixed the camera for me, enabled quite a bit of VR stuff etc. but was too "alien" for mixed use with all the other Androids I operate (plenty of phones and tablets in the family).

So in the case of my son, I carefully checked the camera with the latest Marshmallow Mokee (fully working) and a current Nougat Mokee and thankfully it just went on working. The seamless upgrade from Marshmallow to Nougat failed to work for him, but potentially because my (until then) favorite launcher, the SPB 3D shell sadly ceased to work with Nougat (been using it since Eclair on my Samsung Galaxy S), so I had to resort to a full wipe.

Updated mine from 5.9.026S again to Nougat Mokee (full wipe) and no such luck.

Sadly TWRP backup and restores don't seem to do a 100% job on my Maxes, so I'm somewhat reluctant to do too many Flash jobs. But since le Max is now on standby and no longer my primary, I guess I could some stock to LineageOS tests if I find the time: It worries me, that the AF motor eventually tends to fail, though... Currently I'm just getting FCs on the stock camera, which at least doesn't seem to do any physical damage.