SM-N910A unlock problem

8544919 Samsung Samsung Galaxy Note 4 (AT&T) 2015-12-29 16:43:56 Unlock

Hi, i tried to unlock that phone and after software wait for restart the phone enter in a bootloop and now on recovery mode show dm-verity verification failed already tried to flash with a 5.0.1 and 5.1.1 and same error already wipe data cache. How can get back phone to normal, thanks in advance.