Modding the Lumia 800

Preparing.

Download This folder and extract it via 7-zip

For drivers install Chimera Tool. You don't have to use this. Though you can delete it when you are finished when you are finished

Backing up your Lumia (can skip)

Open the NokiaLumia800 folder, Then extract "Wp7EasyBackup.zip"
Open "Windows Phone Support Tools", then install "WPSupportToolsv2-[YOUR ARCHITECTURE].msi"
Go to where you extracted "Wp7EasyBackup.zip", and run "Wp7EasyBackup.exe"
Click "next", then "Backup", then "Backup"
Wait.
You will get a error message. Ignore it.
Windows + R, then paste in "%localappdata%\Microsoft\Windows Phone Update\"
Copy the folder into a place where you want/remember.

Check if your phone is DLOAD or Qualcomm.

turn the phone off, then press POWER + VOL UP until it vibrates. (From now on called BL Mode)
next connect your phone into your computer.
If your pop-up says NOKIA DLOAD go to the Qualcomm Flashing section.
If your pop-up says QUALCOMM go to Flashing CFW.

Qualcomm Flashing

In the extracted folder, go into NSS Pro, extract the .zip, and open nsspro.exe as administrator, then close it.
Next, download This file and extract that.
Now, copy the .esco file to "loaders/special/wp7" in the NSS Pro folder.
Next, open NSS Pro as admin again, connect your Lumia 800 and go to "Flashing -> WP7 Tools -> Install"

DO NOT FORMAT YOUR PHONES MEMORY IF A WINDOW POPS UP. JUST CLICK CANCEL.

Flashing CFW.

What you need.

A ROM you want to install. I used Rainbow Mod
A Lumia 800 with 100% battery (or at minimum 90%) and a removed SIM card.

How to do.

Run NSS Pro as admin.
Go to Flashing, and then WP7 Tools.
Boot your phone into "Normal Mode" (into Windows)
In the bottom left, choose "Nokia USB Connectivity"
In the first column, choose "Normal Mode"
In the second column, choose WP7 Qualcomm.
Download and extract the file, then locate and extract the 'L800_RM-801.zip' file
Click on OS File, and find your downloaded ROM, (.nb) and open it.
Unplug your Lumia 800, and go into BL Mode again.
Now change the "Normal Mode" column to "OSBL Mode"
Then click "Write OS" and wait.
Unplug your lumia when it finishes.

If your Lumia doesn't start, Hold POWER + VOL DOWN for 10 seconds, and then power button.

Restoring your Lumia.

Go to where you extracted "Wp7EasyBackup.zip", and run "Wp7EasyBackup.exe"
Click "next", then "Restore", then "Restore"
Wait.

Finished!

Done! Enjoy your modded Lumia.

Continuing...

Apps

Download & Install the SDK.
Using "The Archive" (thanks brendan208 on discord) find some Windows 8.1 apps.
Extract the app with 7-zip
If theres a file titled MDILFileList.xml, It wont work.
Else, using, WP SDK (and a CFW), install it.

Resources & Thanks

WP SDK
(russian) Archive for WP7 apps
Web Page Translator
If the links don't work, check here.
app store for wp7

Thank you to the following:
Dev.YoungBoy on XDA for parts of this guide.
mike-2x on XDA for the DLOAD -> Qualcomm part
WunderWungiel on XDA for the backup archive.

Made by WalkTheEarth

Edit

Pub: 14 Mar 2025 15:37 UTC

Edit: 25 Aug 2025 13:37 UTC

Views: 152