write cert successfull but still old imei please help


Platform: Samsung Android
Selected port: COM8
Selected model: SM-G900F
Selected file: C:\Documents and Settings\RANA LIVE\My Documents\Downloads\cert-sm-g900f_353110060712544_r58f0sft2t.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-G900F
Firmware compiled date: Wed May 25 14:05:15 KST 2016
PDA version: G900FXXS1CPEF
CSC version: G900FOXA1CPE1
SW version: G900FXXU1CPB8
Phone SN: R58F7036HND
Android version: 6.0.1 (MMB29M)
Sales code: BTU
Country: UK & IRE
HW platform: msm8974
HW Chip: MSM8974PRO
HW Modem: MSM8974PRO
Codename: kltexx
Checking Root:
Phone is Rooted.
Checking Certificate file…
Certificate file successfully checked
Writing Certificate…
Writing new phone IMEI…
Checking certificate compatibility…
Certificate is compatible
Writing Certificate…
Phone will restart now. Please don’t disconnect cable!
Certificate has been written successfully
Please, restart the phone to apply changes
Performed by 2.3.2 software version

please help grate octopus team….