[7 Mozart General] FrozenLord:
I finally found a way :D

Hi there ;)

After a lot of fiddling around, I have finally found a way to upgrade the radio rom without losing the private data.

You will need at least the following applications:

- A modified RUU so the flash is not erased after the update (which is a standard procedure in the standard RUU, so use the modified one and ignore the HD7-part - it works!) http://xdaforums.com/showthread.php?t=1204733

- The actual radio update (5.71.09.02a from the HTC Mozart Europe ROM) https://rapidshare.com/files/1216711649/RUU_unsigned.nbh

Now, before you start doing anything that you might regret or wonder about later, I suggest that you read the complete post :)

I've tried to explain all the pieces and posted my experience too.

Just for security (better safe than sorry!), you should create a complete backup of your phone to fall back to if anything goes wrong.

A great tool is provided here: http://xdaforums.com/showthread.php?p=14258464#post14258464

Now for the instructions ;)

I am not responsible for your actions or any consequences that are caused by this mod! You do all this on your own and can hold no one responsible but yourself!

Download both files and extract them into the same folder.

Reboot your phone and keep the VOLUME DOWN button pressed, while turning it on

You should see the SPL-screen (a strangely colored screen like this one: http://xdaforums.com/showpost.php?p=16189686&postcount=3)

Connect the phone via USB to your PC

(Windows should install a driver - if not, install Windows Mobile Device Center if you're on Windows Vista/7)

Fire up the modified RUU and click through ;)

You should be ready to go :)

By the way:

I almost killed my phone in the testing procedure because I created an invalid nbh (had no idea what I did and started fiddling without tutorials :D), which seemed to have killed parts of my SPL...

The process was easily fixed (fortunately) by applying the HSPL by DFT, which fixed the problem (which was that my phone always booted back into the SPL-screen, unable to boot into WP7).

But since that moment, I've got HSPL installed.

So if the above procedure does not work for any reason, install HSPL and try again :)

HSPL can be found here: http://xdaforums.com/showthread.php?t=1195647

Also, I updated the ROM using a standard RUU and found out about the FLASH-format after applying the update the hard way (resulting in a totally clean mobile...).

Fortunately, I had created a complete backup before and was easily able to restore it via the same application.

Should you happen to run a normal RUU for who-knows-what-reason, just restore the update. (the radio rom is NOT downgraded in the restoring process, so you're good to go, even if you chose the wrong RUU)

Just out of curiosity (and knowing that I had a backup to fall back to) I reran the update process using the modified RUU (see link above) and the flashing went fine - and the phone did not format itself afterwards :)

Therefore: Ignore the HD7 in the name, it works for the HTC 7 Mozart too.

I used this tool to extract the Radio-rom (and the including customisation) and repacked it using the same tool: http://xdaforums.com/showthread.php?t=1260757

Thanks a lot, ted973 for providing it :)

Additionally, I am glad that DFT had released the HSPL for my phone, else I would have had a problem :D

Thanks a lot guys!

Now have fun with the updated radio and feel free to comment :)

My versions are now:

OS version: 7.10.7720.68

Firmware revision number: 2250.09.12803.111 (unchanged to before)

Radio software version: 5.71.09.02a_22.51.50.21U

Bootloader version: 1.32.2250.1(119496) which is because of the DFT HSPL

Best regards,

FrozenLord