Download And Update Motorola Xoom To Android 3.1 HoneyComb with 2 simple steps

Step 1: Download Android 3.1 Honeycomb update.zip ( Link)
Step 2: Run following commands on Android adb console (must have Android SDK installed)
adb push <zip name> /sdcard/update.zip
adb shell
su
cd /cache
mkdir recovery #it may already exist
cd recovery
echo ‘–update_package=CACHE:/recovery/update.zip’ > command
cat /sdcard/update.zip > update.zip
reboot recovery

Step 3: That’s all, enjoy!