[header] How to root the droid razr maxx hd [title] Tap on " settings, " then tap on " about phone. [title] Determine whether your device is running on ice cream sandwich or jelly bean based on its android number. [step] The tools and files you'll need will depend on your device's android number. 
Android number 4.0.x is ice cream sandwich, and android number 4.1.x is jelly bean. [substeps] Follow the steps outlined in method two if your device is running on ice cream sandwich.