Forensic Analysis of IMEI Manipulation in Legacy Feature Phones: A Case Study of the Nokia X1-01.
Changing the IMEI on a Nokia X1-01 or any other device may have unintended consequences, including:
: Dial *#7780# to restore factory settings (does not change IMEI). Check Software Version : Dial *#0000# . IMEI Change: Everything You Need To Know - Ftp