Note: If the response is ERROR or CME ERROR , the module firmware likely restricts this action. Risks and Consequences
If you have made a factory reset ( AT+QCFG="ResetFactory" ) after changing the IMEI, some modules may revert to the IMEI that was active before the reset, which could be the modified one instead of the factory IMEI. In that case, simply reapply the original IMEI using the same command.
In some scenarios, the undocumented AT+EGMR command is used to alter the IMEI.
Quectel modules are controlled using via a serial interface. The standard command used to view the current IMEI is: AT+GSN or AT+CGSN quectel change imei
This article provides a 360-degree view: the legal implications, the legitimate reasons for changing an IMEI (such as cloning a replaced module on an existing carrier plan), the step-by-step technical methods using AT commands, and the risks involved.
QFlash / QFinder / vendor tools
: Some countries require specific IMEI prefixes for IoT devices rather than phone prefixes. Note: If the response is ERROR or CME
The module's current firmware security policy blocks direct writes to the +EGMR register, or the module is not in factory mode.
Modifying the IMEI on a Quectel module generally involves interacting with the baseband processor via serial interfaces (UART/USB). The complexity varies depending on the module series (e.g., BG96, EC25, M10).
: Contrary to some myths, changing an IMEI does not inherently increase data speeds; performance issues are more likely tied to APN settings or hardware limitations. AT Commands Guide for GSM | emnify Blog In some scenarios, the undocumented AT+EGMR command is
For modules where AT+EGMR is disabled or ineffective, advanced users have explored low-level reprogramming approaches.
The output should reflect the new IMEI.
Operators have algorithms to detect invalid or duplicate IMEIs. Using a modified IMEI can get the module blacklisted, preventing it from ever connecting to the network [3].