The official Android 4.4 KitKat update is expected to become available on the Droid RAZR M sometime in February-March 2014, so in case you don't want to wait until the in order to take advantage of Android 4.4, then here's a guide on how to install the CM 11 custom ROM.
CM 11 is the latest version of CyanogenMod, and is being based on the Android 4.4 KitKat OS. You can port this ROM over to the RAZR M, but remember that this is not an official Android 4.4 KitKat release by Motorola....
Motorola Droid RAZR M: Updating Using CM 11 Android 4.4 KitKat Custom ROM
CM 11 is the latest version of CyanogenMod, and is being based on the Android 4.4 KitKat OS. You can port this ROM over to the RAZR M, but remember that this is not an official Android 4.4 KitKat release by Motorola....
Motorola Droid RAZR M: Updating Using CM 11 Android 4.4 KitKat Custom ROM
