Droid 2 unrooting trouble

[breNTx22]

My phones been acting up. Freezing, temporarily stops responding, ect.

To troubleshoot it i'm going to set it back to stock. I have done a factory reset and cleared the cache. I also flashed it to what I think the stock ROM is.

I think all I must do is boot into recovery mode (PWR + X, then 'search' key) and run update.zip. However it says:

"...Verifying update package...
E:signature verification failed
Installation aborted."

Any ideas?

 

[DroidMakesPwn]

You need to do an sbf to flash it back to stock. It's floating around the forums somewhere. Look up team black hat triple threat thread.

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[louy99]

Yep, sbf is correct. You can't flash a stock rom, you need a computer to do it.

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[Droid-Xer]

Or just restore a stock backup in clockwork and then remove bootstrap and SU and unroot. But an SBF would be easier.