TowelRoot is the best app to root more Samsung Galaxy devices whice are running on Android 4.4.2 KitKat but after upgrading to NF update TowelRoot will not root your phone anymore because Samsung has been patched the kernel in the latest update.
By using this guide I will help you to root the Galaxy S4, Galaxy S5 or Galaxy Note 3 on NF update or later on 4.4.2 KitKat.
- See more at: http://www.w0lfdroid.com/2014/09/TowelRoot-Samsung-Galaxy-S4-S5-and-Note3-Android-4.4.2-NF-or-Later.html#sthash.dFx1I9LA.dpuf