If you need to change IMEIs regularly for legitimate testing, consider using a hardware IMEI switcher board or a software-defined cellular stack like srsLTE, rather than tampering with production-grade modules.
If you need help resolving errors during this process, please share the of your module (obtained via ATI ) and the exact error code you are receiving.
This command displays the module’s IMEI.
: Once approved, Quectel provides specialized AT commands and proprietary tools to rewrite the IMEI. Technical Context & Common AT Commands