[Nokia Lumia 800] Dev.YoungBoy:
Nokia Lumia 800 - First Complete Tutorial for Installing Custom ROM on Lumia 800 with DLOAD or Qualcomm

Windows 7/8

Thanks to Lordmaxey, MarcHoover and Dengel!

Also big thanks to the Chimeratool developers :)

Authors are not responsible for any damage to your device!

Everything you do is on your own risk!

Following this tutorial is your own risk. During the process, your phone will lose all data (game data, apps, photos, music etc.). Make sure to a thorough backup before you start (for example using Zune for music and videos).

Remember to download my folder (NokiaLumia800) from: https://www.dropbox.com/s/1zoh2kzv6kzki53/NokiaLumia800.zip, and extract it! :)

See bottom for FAQ. Will try to update frequently if there happens to be some common errors! :o

Backup Lumia

Backup Contacts:

1.	Add a windows live id (Settings/Email/AddAnAccount/WindowsLive)

Backup Game Achievements:

1.	Open Xbox-Live. Settings/Sync all items

Backup of all data (apps, messages) except Zune content (music, video):

1.	Install .NET 3.5, Zune 4.8.2345.0 and Windows Phone Support Tools

a.	You will find Windows Phone Support Tools in the folder (64bit and 32 bit)​

2.	Extract Wp7EasyBackup, and run application

3.	Click on backup, and backup… (Don’t worry if your Nokia gets an image of a charging cable between pc and mobile)

4.	When finished your Nokia will turn on and you get an error massage (don’t worry)

Your Backup will be stored here: %localappdata%\Microsoft\Windows Phone Update\

Make sure to save it, if you want your old stuff on the phone

Warning. The Backup Process could lead to a failure on custom Roms! (Zune updates need to be supported by your custom rom)

RainbowMod 2.2 for Lumia 800 is not supported

When you have installed the Custom Rom:

1.	Open WP7 Easy Backup Tool

2.	Click Next, then click Restore

3.	This can take a while

​

STEP 1 – Dload or Qualcomm

First, check if you have Dload or Qualcomm on your Lumia 800:

1.	Turn off your Lumia 800

2.	Hold Power + Volume up, wait to it vibrate

3.	Connect it to the computer

4.	If your pop-up says NOKIA DLOAD go to STEP 2

5.	If your pop-up says QUALCOMM go to STEP 3

a. Remember to hit cancel on format disk:

​

NOT a pop-message:

Right click on Safely Remove:

6.	Disconnect the phone cable from the computer

7.	Problem to start your Lumia? Hold Power + volume down for around 10 sec. Then press power button

​

STEP 2 – Install Qualcomm

Check list:

•	Install Chimeratool, and register your mail (You will get a trial version for 2 days)

o	https://chimeratool.com/downloads​

•	Make sure you have an Internet connection

​

Follow these steps:

1.	Turn off your phone, then connect via USB, while pressing Volume Up

2.	If you have Nokia DLOAD press Flash Qualcomm

3.	Wait to it is finished

4.	Disconnect the phone cable from the computer

5.	Problem to start your Lumia? Hold Power + volume down for around 10 sec. Then press power button

​

STEP 3 – Install Qualcomm drivers for pc and Lumia

Check list:

•	Downloaded my folder (NokiaLumia800)

•	Internet Connection

​

Prepare for flashing rom:

For Windows 8:

1.	Chose a. or b.

a.	Open CMD with admin and write "shutdown -o -r -t 0"

b.	Hold ⇧ Shift + click Restart (Windows 8)​

2.	Click on Troubleshoot, Advanced options, Start-up Settings, Restart

3.	Click F7 for Disable driver signature enforcement

For Windows 7:

1.	Restart your computer

2.	Before the Windows boot-screen appears hit 'F8'. This is best performed by pressing F8 repeatedly once the reboot starts

3.	Select "Disable Signed Driver Verifiction" from the list of boot options, it will be near the bottom

Follow these steps after following Windows 7/8:

4.	Enter OSBL MODE:

a.	Turn off Lumia 800

b.	Hold Power + Volume UP wait to it vibrate​

5.	Connect your Lumia to pc

6.	Open System and go to Device Manager

7.	Device Manager, right click on the CMDA and click Update Driver Software

8.	Click Browse my Computer for driver software

9.	Click on Browse and find the Driver-Qualcomm folder

a.	If you have 64 bit Windows install amd64

b.	Else install x86​

10.	Click next and it will install. You will probably get a message like this:

11.	Click Install driver software

12.	And it will look like this:

​

​

Install Windows USB drivers:

1.	Open the Driver-WindowsUsb, extract and install.
​

Step 4 – Flashing Custom Rom

Check list:

•	A Rom that you want to install (for example Rainbow Mod)

o	http://xdaforums.com/showthread.php?t=1665651

o	If you want a Stock Rom check NaviFirm+​

•	Extract NSS PRO from my folder (NokiaLumia800)

•	Remove the SIM card

•	Ensure 100% battery power​

​

Follow these steps:

1.	Run NSS PRO as administrator

2.	Go to Flashing, then WP7 Tools

3.	Connect your mobile to the pc

4.	On the bottom left, choose Nokia USB Connectivity

5.	Click on Detect, and Normal Mode automatically appears

6.	Check of the WP7 Qualcomm on the checkbox below:

7.	Click on OS File, and find your downloaded Rom (.nb), and open

8.	Take your Lumia out of the PC, and turn it off

9.	Now hold Volume Up and plug it into the USB

a.	Wait to it vibrate

b.	Remember, always hit cancel on format disk!​

10.	Change the Normal Mode to OSBL Mode

11.	Click Write OS and wait to it is finished:

12.	Plug your Lumia out of the pc.

13.	Problem to start your Lumia? Hold Power + volume down for around 10 sec. Then press power button
​

​

Need code for Windows Live?

1.	Check this link: https://gethelp.live.com/Pages/MSO.aspx?Locale=en-us&Product=wp7&Topic=Marketplace&ForumID=226241

2.	Chatting

3.	You should save your number if a later reset is necessary
​

Hotmail error code (85010017)?

1.	Settings/E-mail/Windows Live

2.	Change server name to bay-m.hotmail.com
​

First time you connect your Lumia to Zune after installing ROM:

1. The first message you get is a headline where it´s written "START"

2. Click Next

3. Next headline is "Name your Phone", write a name on your phone

4. Click Next, and it will say "Checking for update" (Don´t worry, it will not install the original 7.8 software for Lumia 800)

5. Just wait, and suddenly you will have your phone ready for syncing

You should also do the following:

6. Make a new folder for syncing images from Nokia:

a) The Nokia starts with the beginning numbers in the picture name, and the new picture names will look like these WP_000001 (2), if you not make a new folder to sync with

b) Open Zune, and go to Settings > Pictures and Videos > Manage​

7. Then it is just to sync your music and videos
​

How to backup SMS before installing a new Custom ROM?

1.	Check this link: http://xdaforums.com/showthread.php?t=2691682
​

Enjoy! :D