mobile

I Want To Upgrade My Motorola Droid RAZR M Xt907 In Kitkat OS

How To I Update In Android Kitkat OS
My mobile Current Information is
System Version : 98.18.78.XT907.Verizon.en.Us
Model Number : Droid RAZR M
Android Version : 4.1.2
Baseband Version : SM_BP_101032.020.32.78P
Build number : 9.8.1Q-78