I factory reset my Samsung Grand 2 then charged it. When I saw my phone it was updated in kitkat. I accidentally hit the install and reboot. But after that, it stuck in logo screen. I've tried to wipe data, cache and everything. So, I flash it with odin with correct latest firmware. But it keeps on failing and appears firmware upgrade encountered an issue. Please select recovery mode in Kies & try again. Ive tried to fix it with Kies but there's no chance. I also brought it to service center but they said it keeps on failing and the program cant enter.
This is the ODIN log:
ID:0/003> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> root66_VZW_stock_system.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/003> Odin v.3 engine (ID:3)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> system.img
<ID:0/003> NAND Write Start!!
<ID:0/003>
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
I've been searching how to fix my phone.
PLEASE SOMEONE HELP ME.
This is the ODIN log:
ID:0/003> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> root66_VZW_stock_system.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/003> Odin v.3 engine (ID:3)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> system.img
<ID:0/003> NAND Write Start!!
<ID:0/003>
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
I've been searching how to fix my phone.

PLEASE SOMEONE HELP ME.