NOTE: Once you apply this update, you can NOT downgrade to a previous version. This applies to locked AND unlocked users! You have been warned.
Purpose of this thread:
To get you, the locked or unlocked Moto X xt1060 owner, from any version to 4.4.4 (KXA21.12-L1.26).
Things you will need:
FXZ KXA21.12-L1.26 Thanks to @stras1234 and @Skrilax_CZ
44310B2E4A0016ABDFD108DC9E6F4B89 (as requested)
WARNING: This new FXZ contains the erase userdata line so it WILL wipe your data.
Use the RSD Flasher with the KEEP DATA option to flash this to your phone using RSD Lite.
Alternatively you can use House of Moto with the KEEP DATA option to flash this to your phone using motofastboot.
This will get you a clean OTA install with no data loss. You will lose root.