Android 2.2 (codenamed Froyo) for Nexus One is out. The update is being rolled out over the air (OTA) which can take a long time before it reaches your handset. If you are got geeky sense and can’t wait that long, here check out the steps to getting the Android 2.2 on your phone the manual way after the break.

Step 1: Download the official Android 2.2 (FRF85B) firmware from here.

Step 2: Rename the downloaded file to update.zip and not update.zip.zip.

Step 3: Move the file to your microSD card via USB.

Step 4: Power off your Nexus One.

Step 5: Turn on your Nexus One while holding down the Volume Down button.

Step 6: From the screen that pops up, scroll down to recovery and press the Power button.

Step 7: Wait for the triangle with an exclamation symbol to appear. Once the symbol shows up, press the Power and Volume Up button at the same time.

Step 8: Select the Apply sdcard:update.zip option from the menu that pops up.

Step 9: Wait for the Install from sdcard complete message to appear. Once that appears, select the reboot system now option and let the device reboot.

Voila , you just got Froyo on your very own Nexus One.

(source: geekword)