Nexus One (Android 2.1 upgrade android2.2)

The following error occurs after applying sdcaard: update.zip:

E: Can't open/Cache/recovery/command

-- Install from sdcard...

Finding update package...

Opening update package...

Verifying update package...

Installing update...

Assert failed: file_getprop ("/system/build. prop ". "Ro. build. fingerprint ") =" Google/passion/mahimahi: 2.1-update1/ere2 // 24178: User/release-kyes "|" Ro. build. fingerprint ") =" Google/passion/mahimahi: 2.2/frf50/38042: User/release-keys"

E: Error in/sdcard/update.zip

(Status 7)

Installation aborted.

If the cup is unavailable, you cannot find the package from erd56c to frf50 or another version ....

Upgrade erd56c to ere27:

Http://forum.xda-developers.com/showthread.php? P = 9518576

Upgrade ere27 to erf50:

Http://www.android-hk.com/news/nexus-one-manually-update-android-2-2/