How to instal Stock rom LEeco Le Max X820

Hello everyone,

I bought the leeco le max 2 via geekbuying last week and got some issues with wifi and mms (among other issues), and i would like to instal an indian stock rom.

I will try to be as clear as possible and give you as much info as i have, but since i don't really master the subject it will be a bit messy i gess.
On the box it is said that the phone is a X822, but when i go in the options, it says it is a X822, so i don't know wich one it is. It has 32g and 4gb of ram (). It has eUI 5.8.018S installed on it.

I downloaded 2 indian roms the 16s and 19s (), but what is the difference ? Also i found some recoveries but what is this for ?

Yesterday i installed a stock rom on my redmi note 3 pro via adb () and it was very easy.

I cannot find such a tutorial for the X820, i could need some help.

I tried to install with this method :

1) Download the Indian Le Max 2 ROM from here. Download fastboot and adb and install to your PC from here
2) Keep the firmware zip file in the fastboot, adb folder of your PC. In that folder, press Shift + Right click and click on "Open command window here".
3) Boot into TWRP recovery of your phone. (Power + Vol Up) button together at boot. Perform full wipe so that there is no OS installed.
4) Enter Adb sideload
5) On PC's command prompt window which we opened earlier, enter these commands adb sideload LE_X2_X820-OS-OP-FGXOSOP5801507066S-5.8.015S.zip
6) Wait for stock firmware and recovery to be installed. Takes a long time. You can again factory reset if you want to but I did not need to do it.
7) Phone should be stock now with google app store and least bloat in Indian ROM.

But i get stuck because the adb "cannot read" the zip file. The adb find the device and the X820 go into EDL mode easily.

I also tried this : . But it also didn't work. It says "manifest.xml not found in flash".

Then i tried to rename the rom "update.zip", copy it in the phone internal storage and go into recovery (power up + power button) but it doesn't find any file. "failed to uptade!" cause : APK not found.

I don't really know what to do next, i'm a bit lost.
Could you help me installing a official rom so that it fixes my wifi/network/mms issue please ?

Thank you in advance, if you need any other information or have advice i would be really happy

Sweet-death

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