Well, fixed it myself!! :smile:
Here is what I found was the issue and resolution:
Issue: When using Seven Eighter to directly update the cabs, I started of impatiently and just selected English(US) for the language pack and went ahead with the update. Update was successful but lots of apps/tiles stopped to work. My Zune backup was screwed so nothing to revert back to. In short - phone was toast! I even tried sending the language packs for English(UK) and other installed languages on my phone separately, but all kept failing.
Resolution: Got a hint from a mention by
HeathCliff74 on XDA dev forums. The gist is, just like the updater updates the phone's OS files, it needs to sync-update the language files too, else they mismatch and when the new OS tries to load new language files, it fails, causing the apps to misbehave. So, to fix it, I had to update
ALL the versions of the the English(UK) - the default language - on my phone. I started right away from NODO update for English(UK), the update resulted in message that it is already installed. Then I moved to Mango version of English(UK) and that installed fine! So that was the missing link for me. Then Adding 8112 and 8558 updates for Tango and beyond for English(UK), they all installed fine. Please
NOTE that I had to be patient, installing these updates one at a time. And the patience paid off, my phone is back up and running!! :smile:
PLEASE NOTE: I can
*confirm* that one needs the language pack files of
*just* their default language,
*unless* they plan to change the Display language/keyboard settings on their phone to some other language. So, as in my case, I just need English(UK) and just updated those files and everything works fine for me now.
XDA links for cabs:
[CAB] Official WP7 Updates List up to WP 7.8 + ALL LANGUAGES complete + OEM updates - xda-developers
Hope that helps.