Step 1: You should have stock updated to lollipop, if it is updated to lollipop, go to step 2 if not, update it to lollipop
Step 2: Flash TWRP 3.2.2 or higher, if it is flashed, go to step 3, if not, flash TWRP.
Step 3: if HEX firmware patch is flashed go to step 4, if not flashed Wipe data...