[Tool] Need help with Flash ROM/update to S7 Edge SM-G9350 Hero2qltechn model

[springxuan]

Hello everyone,
I need someone who could help me to fix my phone to go back to the original state even though the phone is working but I cannot do any update, backup, or root the phone. The IMEI from the phone is incorrect (but I have the original one). I tried many apps to correct my IMEI but it didn’t work since the phone is not rooted. Please see below:
Phone specification:
Model: S7 Edge (hero2qlteczc)
Manufacturer: Samsung
Baseband Version: MOLY.WR8.W1449.MD.WG.MP.V23.P8, 2016/07/25
Build Number: MMB29M.G9350ZCU2APD1
Bootloader: unknown
Kernel Version: 3.10.0-2828982, wangsongsong@android-server3 #1 32-bit
Root existence: Yes (but when running another program to check, it said this phone is not rooted)
Hardware / board: mt6580
GPU: ARM Mali-400MP
Total RAM: 3.91GB
OS version: Lollipop MR1 (6.0.1)
SDK: 22
CPU Architecture: ARMv7-A
Board: unknown
Core: 4
The back of this phone labeled: Galaxy S7 Edge, Model: SM-9350 UD
I bought the phone from the owner whom may flash the wrong ROM.
The phone is working but I couldn’t do any root, any backup at all.
Can someone help me to find the correct ROM, the application, and any info how to make this phone back to the original state. If you need more information about the phone, please let me know. Thank you in advance!