It was a few days ago that the Google Nexus One got a small update to Android 2.2.1. The update was a pretty minor one and mainly aimed at fixing bugs with the present firmware. Even though this update is a small one, owners of different handsets are already impatient for their share of Android 2.2.1 love. The good news is that at least the Droid X owners can have their Android 2.2.1 share of love.
Motorola has not released an official Android 2.2.1 update for the Droid X but the modding community unofficially has. They have released a custom ROM based on Android 2.2.1 for the Droid X. However, Droid X owners need to make sure that their handset is rooted before proceeding with the update process. The process is quite complicated and risky so users should make sure they know what they are doing before updating their phone.
Users are also warned that they won’t be able to downgrade to Android 2.2, once they have flashed the Android 2.2.1 update on their handset. Droid X owners can find the step to update their handset to Android 2.2.1 here. If after the update users are facing any kind of rooting issues, then they need to use the z4root application on their handset to get back root access.
Image Source Droid Life