You can use https://github.com/srlabs/blue-merle if you want to change your IMEI
>The blue-merle software package enhances anonymity and reduces forensic traceability of the GL-E750 / Mudi 4G mobile wi-fi router ("Mudi router")
>Mobile Equipment Identity (IMEI) changer
>Media Access Control (MAC) address log wiper
>Basic Service Set Identifier (BSSID) randomization
>MAC Address randomization