Do not waste time on AT+EGMR . You need the commands.
by the manufacturer, as it serves as a unique identification code for the module. Modification is typically only allowed for legitimate repair or regulatory purposes after signing legal agreements with Quectel. Quectel Forums Official Procedures quectel ec25 change imei
To successfully change the IMEI on a Quectel EC25, gather the following: Do not waste time on AT+EGMR
Some industrial modules require entering an engineering or manufacturing password via an AT+QNVW or AT+QFASTBOOT sequence before unlocking the registers. quectel ec25 change imei