I have a once-rooted Nexus one. Since then I unrooted it to enable automatic upgrades, and currently have a stock 2.2.
I got the notification to upgrade my OS (to 2.3 I assume), but after my phone restarts, I am presented with the following text in the recovery screen:
Build : RA-nexus-v1.5.3 Finding update package... Opening update package... Verifying update package... E:No signature (8 files) E:Verification failed Installation aborted.
How do I fix this?