Motorola Moto X 1st generation has started getting Latest April 2016 Android Security patch . This update brings important security improvements to Moto X 1st Gen .
Motorola has already announced that Lollipop is the last Android Updated for Moto X 1st Gen , But The device will keep getting Android Security update till Motorola discontinues it .
Motorola has posted release notes for the Same Android Security Updated for Moto X 1st Gen .
You can check the update by Going to Settings > About Phone > Software update on your smartphone .