Failed fastboot to ICS from JB

[Latchback]

Hey everyone,

So I messed up big time here: I recently got the JB update, rooted, and messed with something I should not have (without backing up) and ran into a boot loop.
I attempted to fastboot back to ICS, and it obviously failed while flashing. (now I realize that was a mistake, I knew you could not fastboot from GB -> ICS, so I do not know why I did not realize the same with JB -> ICS)

I know there is no SBF files for JB yet, which makes unbricking my phone an issue.

Does anyone have any solutions on how I can unbrick my phone? (there is a solution for the razr, but I doubt that it would work for me)

 

[Bense]

I'm in the same boat here, I think I may have figured it out. I downloaded the d4 fxz file, and extracted it. I also downloaded the utility that is mentioned in that razr thread that you linked.
I unzipped that.

I then replaced all the razr files in that razr utility with files from the droid4 fxz. and I edited the batch file and replaced RAZRSafestrap-ICS-2.11.apk with Droid4Safestrap-ICS-2.11.apk.

I have now booted into stock recovery, and I'm attempting to install the Jellybean OTA. We'll see how this goes.

TBH, it looks like this script is just a fancy way of editing the xml file that is in our droid4 fxz. Remove the lines where the thing fails. For example, step 6/17 fails at cdt.bin
so I removed the following line from the XML file. then ran RSD lite like i normally would.

<step operation="flash" partition="cdt.bin" filename="cdt.bin" MD5="3560db7df2164e13af6ee64c2b36dd11" />

It then failed at some other step, I forget which. But I removed the corresponding line from there.

Hope this helps lol

 

[Latchback]

Fastboot 4.1.2 files for the Droid 4 are now available. Fixed my problems.

Droid-Developers SBF