@אברהם-א זה אינדבדואלי לכל יצרן לפי מה שהגדיר
Spoiler
To change the Imei , please pick up the handset and dial : *00#035#123451234512345#
replace the 123451234512345 to your legal IMEI, you can get a legal imei from a useless discarded 4G phone
After dialed the code, you can hear a sound "doooooo...." that means succeed.