If you want to Root, it will install SuperSU v2.49 with Stericsson Busybox 1.23.2 which is the recommennded busybox. 
If you want to restore your NVRAM/IMEI >>PLEASE KEY-IN your own IMEI number or else both of my phone and yours might have the same IMEI number resulting in people calling me you will also receive the call resulting in you or me being billed for overseas calls which we never made.