You should only have to do this when RSD Lite and/or Fastboot are not working on your phone and you want to update to the latest OTA.
Use RootExplorer and replace the original preinstall you have (make sure you clear your folder of everything first) and install one of these preinstall folders (whichever version you are currently on).
Preinstall folders to replace yours:
6.11.744
6.11.748
6.12.173
If your OTA still is giving you an error with something along of the lines of app_check_fail and giving you a blur_linkedin.apk (for example) then continue reading this guide.
You may have gotten an error similar to this:
Verifying current system...
assert failed: apply_patch_check("/system/app/blur_linkedin.apk", "14edad57cef3b955a15ff5c3a0d6e519f3949dbc"
, "ad9896a7e8589427d5073babccbe6513cfc79773")
E:Error in /tmp/sideload/package.zip
(Status 7)
Installation aborted.
I solved this by using RootExplorer, going into /system/apps/ and pasting in everything from the folder you can download below that contains all of the bloatware you may or may not have removed. Just replace everything in your /system/apps/ folder with this. Don't clear it out before like the preinstall, just copy, paste, replace. (This is so any Launchers you want will not be deleted)
Links to backed up /system/apps/ folders:
6.11.744
6.11.748
6.12.173
All of these finally solved my error and I was able to upgrade from .744 to .748 (and from .748 to 173, to 174) using the official OTA on my original rom. I re-rooted using the VooDoo RootKeeper app from the market, reinstalled RazrSafeStrap.apk (found here: ), then had to restore system using the SafeStrap menu to ensure my enabled Safe System ROM ran again.
If anyone is still having issues please reply to this thread with the EXACT error the install is giving you, tell us whether you are using SafeStrap, what kind of OTA (forced or regular), and any other details we could find helpful. I struggled with this for a while and I worked hard to gather all this information. Keep diggin!
Ask questions here if you have any.
Edited by mattlgroff, 05 February 2012 - 02:26 PM.
Updated