[HD2 Windows Phone 7 Q&A, Help & Troubleshooting an] NYSEAN1:
I am a flash addict and I am sure most of you are. I can't stand a smooth running phone that works flawlessly. If it does, then I must do something to it to destroy it's stability. Well, it's not easy to brick HD2 unless you are a real dummy or like to live very dangerously lolll....even that can be fixed...but it was more difficult for me to find a way to unlock my SD card back to normal after WP7 installation. Some suggested in this forum that some of the cameras and nokia phones will do the trick...I was frustrated when I screwed up my 16GB sd card and could not find that camera or phone...as it won't make sense to buy them to restore a $15 card.....so I gave up on that card until today....I decided to play with WP mango again with the same sd card...resulted in locking it again...my challenge was to succeed unlocking it this time.....followed the same old procedures with no success...I tried and exhausted all options again!!! Then I decided to pop my sd card on my second hd2 which is running android with 4ext recovery installed and try to format it or something....and it worked!!!!! Just repartitioned the card and reformatted and it automatically unlocked it during the process....No step by step by step by step installation of software or reading pages or running codes.....nothing else was needed!

Life is meant to be simple after all :)

Anyone who is having the same issue with sd card after Windows Phone 7 or 7.5 installation just repartition and reformat your card via 4ext recovery and it will work...nothing else needed :} Good Luck!

All credits to 4ext recovery developer....and the developer must be proud to find this info.

Here is Step by Step process-

If you are running Android NAND and have 4ext recovery installed....then

1. Turn off your device

2. Take out the SD card(if there is any in it) and insert the one you want to unlock/fix

3. Turn on your device HOLD red power button until you get to aMAGLDR v1.13 menu

4. Go to option 8. AD Recovery hit green button for it load

5. Now you should have 4ext recovery(mine is version 2.2.7) menu

6. Scroll down to Advanced

7. Choose> Partition SD Card

8. Choose whatever size you want to first one, second one to be and the rest goes to fat. If you want all in one partition, just choose '0' for the first two and '0' as swap.

9. Follow on screen instruction you may see.....and it will delete all previous partition and create new one

8. NOW go back to main 4ext recovery menu....and format you SD card...AND there it it! Your SD card it back to normal...enjoy :)

NOTE: I use 4ext recovery that you flash via usb flasher thru magldr NOT the one from market. You can find the flashable one in here. I will try to find the link and post it. BUT it is not and will not be my work!

Here is a link I found....but this NOT what I used. I used this recovery that I found in one ROM link I have tried in the past which I can't think of but I have been using the same recovery since then because it is the BEST with the option of EXT4 file system....the one I have you can directly flash it like any other recovery you normally would to partition NAND to flash NAND Android roms. Nand partition size has nothing to do with sd recovery steps.

http://xdaforums.com/showthread.php?t=1297587

Since I did not use the above option....I won't be much of help. But from my understanding you can use this option to update your current recovery to 4ext recovery and then follow my steps. The app from the market would require to update your current recovery as well to be able to use my method to restore your SD card after WP7 installation Good Luck! Although it is a very simple process to undertake, I am not responsible if you damage your phone or the sd card even more!!!

If someone who has the usb flashable version of 4ext recovery(for HD2) could attach it or provide link that would be great for everyone. Mine is installed in the phone and I don't seem to have that file....too many files I download everyday and must delete them all at some point :)