Unable to sell my phone!!!!

I did a factory reset / cache partition wipe and sold it to a guy, now he is telling me that the phone says it is locked to my previous Google Account that was used to sign in to the device so I changed my password temporarily and gave him my email/password but when he signs in, it says that he needs to sign in using one of the owners accounts used on this device! but this is the account, I don't have any other Gmail account since 2 years

I then googled this problem and I saw many people experiencing the same issue and the solution was to load the OS again, so I downloaded Lollipop 5.1.1 from Sammobile but when I try to flash it it gets stuck on SetupConnection

please help now the phone is stuck on the Downloading page and since I cannot remove the battery, I can't even do a battery pull anymore!!!

But now I still cannot flash, here is what Odin says:

<ID:0/006> Initialzation..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> SingleDownload.
<ID:0/006> sboot.bin
<ID:0/006> NAND Write Start!!


==============================

did another reboot of the phone and tried again, now I get this:

<ID:0/006> Added!!
<OSM> Enter CS for MD5..
<OSM> Binary Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/006> Odin engine v(ID:3.1100)..
<ID:0/006> File analysis..
<ID:0/006> SetupConnection..
<ID:0/006> Initialzation..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> SingleDownload.
<ID:0/006> sboot.bin
<ID:0/006> NAND Write Start!!
<ID:0/006> cm.bin
<ID:0/006> FAIL!
<ID:0/006>
<ID:0/006> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
============================================

This is the firmware I am trying to flash on my Galaxy S6 Edge+ 64GB International Version bought from Dubai:

G928CXXU1AOH3_G928COJP1AOH3_LYS

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by joana95
2 hours ago
Last post by destin96
1 hour ago
Last post by rutherford.alfred
3 hours ago
Last post by elna87
3 hours ago
Last post by bernardo92
4 hours ago
Wm1.60 (21014)
Started by estokes
Last post by imacejkovic
3 hours ago
Last post by ohane
3 hours ago
Last post by gonzalo17
3 hours ago
Last post by fbraun
11 minutes ago