A new ‘project’ was in the works from Moto, and they were asking for participants who have the “Google Experience” version of the Wi-Fi only model of Motorola Xoom tablet. We hoped it could be the Android 4.0 ICS update for Xoom. Good news is that the ‘project’ turned out indeed the Android Ice Cream Sandwich OS. The manufacturer has started rolling out the Android 4.0.3 Ice Cream Sandwich OS update for the Wi-Fi Motorola Xoom, as well as 4G LTE Motorola Xoom devices (Specifically for the members of the official Motorola forums and Feedback Network). The build number is IML77. The update roll out will continue throughout the weekend. Motorola promises they will very likely release this update to the masses.
That Android 4.0.3 ICS update should be hitting your tablet at any time via OTA process (Over-The-Air), asking you to accept to download it. You can also force the update by heading over to Menu –> Settings –> About Tablet –> System Updates –> and tap Install Now button –> Device Reboots automatically. This process should initiate the latest software upgrade process.
How To Manually Update Motorola Xoom for 3G/Wi-Fi Xoom
Here we’ve got a zip file of the Android 4.0.3 ICS Update IML77 and instruction to install it on Xoom tablet. You need to flash this update file with a thumb drive and a connected USB cable works best. The rooted running Xoom owners should downgrade to Honeycomb HTK75D before applying this update.zip.
1) Place the downloaded update.zip file (you can rename it if you want) on the usb stick.
2) Connect the USB stick to the host cable and connect the host cable to the Xoom.
3) Power off.
4) Power on, tap Volume down a few times until you get a list of options you can cycle through.
5) Select Android Recovery.
6) Tap Volume up to boot into recovery.
7) Hold power and tap volume up at the green android screen to get the BLUE recovery menu.
8) Select apply update from USB drive.
9) Select your update.zip from the menu… enjoy!
Wi-Fi Only Xoom Instructions:
There is no menu option for android recovery, you’ll need to use:
adb reboot recovery.
you can plug in the usb stick at the green android guy screen.
Via: XDA Developers Forum