Manufacturers intentionally omit IMEI modification features from user interfaces to:
stands for International Mobile Equipment Identity . It is a 15-digit number unique to every mobile phone, tablet, or smartwatch with cellular capability. All Nokia Imei Change Code
Only reason #3 and #4 are legitimate. The rest are either ineffective or illegal. All Nokia Imei Change Code
If it sounds too good to be true, it is. No one outside of Nokia’s factory can change your IMEI with a simple code. All Nokia Imei Change Code