[Q] Razr M bricked while flashing 183.46.15 firmware topic

Hi

I have a problem regarding my Razr M xt907 (firmware: 182.46.15).

i was searching any method to root my phone and found this method for 183.46.15 (but my firmware was 182.46.15) :

forum . xda-developers . com/droid-razr-m/general/root-droid-razr-m-xt907-183-46-15-t3030852

I tried this method to root but i did'nt work. Somebody had written there that if I flash 183.46.15 using rsdlite than root can be possible using the said method.

So i downloaded the firmware: vzW_XT907_4.4.2-KDA20.62-15.1_1FF.xml
but flash failed at 15/17 system.img,

now my phone is stuck at AP fastboot,
Fastboo reason : flash failure



does someone know how to i can get out of this?????