cannot update Omnia 7 after 7740

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I can't update my phone after installing the 7.10.7740 back in november 2011. Zune tells me my phone is up to date, but i know two other updates were released in 2012 including Tango. I also seem to have the IE tabs problem described earlier in the forum. What could be the problem? Any solutions? Thanks in advance.

BTW it's an unlocked T-Mobile Omnia 7 8GB

What method did you use to update? Have you ever done anything to "force" an update in any way? Some of those break future updatability of the phone. Also, have you ever messed with the DeviceTargetingInfo registry key? The values there control updating, and messing with them can (among other unpleasant things) break it.

There's a tool that can send the CAB updates directly to your phone, along with a list of the CAB files for download and info on how to use the tool, available on teh Dev&Hacking sub-forum. Be cautious if using this (make backups for sure) but it works for situations where there's no official update available.

I updated via Zune and never tweaked the registry. Could a hard reset help before trying custom ROMs?

If you inadvvertently applied any hacks, a hard reset will clear them. However, if you want to avoid losing data, you can certainly use the CAB sender to install updates directly. Just be sure you follow the instructions regarding language packs and such!

Well, I tried the hard reset and that got rid of the IE tabs problem. Oddly enough, battery life seems improved. Still not getting the updates, though. I guess I'll have to upload the CABs, but can I go straight from 7740 to Tango? Or do I have to flash updates in chronological order?

Better to update them in order. also be careful to install all the necessary language packs. Plus, there is some update for Omnia that locks the phone. Be careful of that too.