G920F 5.1.1 imei repair failed

G920F 5.1.1 xxu3coi9 imei 350000000000006
write certificate but imei always the same

Platform: Samsung Android
Selected port: COM3
Selected model: SM-G920F
Selected file: C:\GSM\Samsung\G920F\cert-sm-g920f_359845068285324_rf8g42de91n.cert
Select Certificate2...
Selected file: C:\GSM\Samsung\G920F\cert-sm-g920f_359845065504586_rf8g41fbddb.cert
Please, press "OK" button on the phone to allow USB debugging..
Please, press "OK" button on the phone to allow USB debugging..
Detected phone model: SM-G920F
Firmware compiled date: Fri Sep 25 16:07:03 KST 2015
PDA version: G920FXXU3COI9
CSC version: G920FOXX3COI6
SW version: G920FXXU3COI9
Phone IMEI: Unknown
Phone SN: RF8XXXXXXXXX
Android version: 5.1.1 (LMY47X)
Checking Root:
Phone is Rooted.
Reading security backup, please wait...
Backup saved as C:\Program Files\Octoplus\Octoplus_Samsung\BACKUP\Security-SM-G920F-Unknown15-12-2015_17-03-01-.asec file
Checking Certificate file...
Certificate file successfully checked
Deactivating MSL...
Executing exploit...
Exploit has been executed successfully

I tried diff certs but the result is same, everything ok but no change

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G920F 5.1.1 imei repair failed