[Q] Moto XT1097 AT&T fastboot loop. topic

I tried to update my moto XT1097 AT&T locked version and it did not complete the update successfully. It goes until flashing the boot.img, failed and don't go any further. I supposed it is because it is a locked phone. After this, the phone went to a fastboot mod loop. Even If I tried to sideload the orignial rom or use the fsaboot comandts to restore the original rom it remains in this mode.

It generates a first error when I tried to issue the command "fastboot flash partition gpt.bin" returning this:

target reported max download size of 536870912 bytes
sending 'partition' (32 KB)...
OKAY [ 0.004s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.013s

And the phone display shows "hab check failed for primary_gpt"

I am issuing this command from the folder where the files of the original rom are located.

I tried to use a different gpt.bin file, from other ROMs and the same thing happen. I also tried another Lollipop ROM and not luck at all.

What I understand is that the gpt is the partion table that indicates where begins and where finish the diferent partitions into the phone, so I guess the problem could be resolve if I can change the gpt file into the phone for the original one.

I have tried to follow with the rest of the instalation but the motoboot and the boot files also are rejected and the system files are denied due an authentication problem.

The roms I have tried are:

ATT_XT1097_4.4.4_KXE21.187-38_cid1_CFC.xml
TMO_21.21.42.victara_tmo.tmo.en.US
4.4.4_to_5.0-11OTA

And the first one I used, which reach the same stage every time is:

RETBR_XT1097_5.0_LXE22.46-17_cid12_CFC.xml

I really appreciate any help and ideas you can give me to get my phne back to kitkat. I am not an expert but I am willing to do and learn what it takes