G925T Unlock Problem

Hello All ..
i have bought galaxy s6 edge t-mobile and i have tried to unlock it via Z3X Box ..
here what i do for it :
Version 5.1.1 ROOTED

- At first tried to unlock it when i have got my device and it shows phone successfully unlocked
- when device back to work again it shows security damaged ... then i have checked IMEI its NG and 350000xxxxx/19
- i have write new clean cert. and its done . .. turned my phone on and checked imei its new one and status imei ok !!
- tried to read codes and do unlock again --> it shows successfully unlocked but when phone start its back to imei 35000xxxx...
- flashed a new firmware and imei is still 35000xxx .. then back to write new cert and done AND NEW IMEI REGISTERED .. then WHEN UNLOCK AGAIN MY DEVICE IT BACK TO 350000xxx

Please help and if you dont know this problem, please dont type your solution cuz i have tried all solutions in all forums
i wish i will find the solution here

Thanks