N920T PG1 Write Certificate

I have been trying to fix Unknown IMEI and searching for solution.

Some people are saying they are writing successfully using Gcpro.Is there a workaround on Octoplus to right IMEIon N920T PG1?

As you can see it below, Octoplus process says Certificte has been written successful but the phone imei is still unknown. (FYI- I also tried the latest Octoplus 2.3.6) on my other computer but the result is same.

Welcome to Octoplus/Octopus Box Samsung software version 2.3.0

Platform: Samsung Android
Selected port: COM39
Selected model: SM-N920T
Selected file: C:\Users\Dawd\Desktop\Samsung files\Note 5\cert-sm-
Can’t kill external ADB references. Please, close all programs that use
ADB server.
Detected phone model: SM-N920T
Firmware compiled date: Fri Jul 1 14:40:25 KST 2016
PDA version: N920TUVU3DPG1
CSC version: N920TTMB3DPG1
SW version: unknown
Android version: 6.0.1 (MMB29K)
Country: USA
HW platform: exynos5
HW Chip: exynos7420
HW Modem: unknown
Codename: nobleltetmo
Checking Root:
Phone is Rooted.
Reading security backup, please wait…
Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung
Checking Certificate file…
Certificate file successfully checked
Deactivating MSL…
Executing exploit…
Exploit has been executed successfully
Writing Certificate…
Certificate has been written successfully
Please, restart the phone to apply changes
Performed by 2.3.0 software version