Note 4 sm-n910t 5.1.1 write cert question

Hey guys, i am just wondering if this phone can be flashed with new IMEI cert file? i tried a couple of times to do a repair/wipe security and octopus say it does it, but the IMEI is still the same. thanks in advance.

the search function of the forum is not working so i am not able to find the solution. so i am sorry if this has been asked before.