On most Quectel modules, the IMEI written by AT+EGMR survives power cycles. However, certain firmware versions (e.g., on the RM520N‑GL) may revert to a previously stored IMEI if the factory reset command ( AT+QCFG="ResetFactory" ) is issued later.
Utilize Quectel evaluation boards which come pre-provisioned with valid test identities recognized by major networks.
The Ghost Device
Only perform identity simulation testing inside an RF shield box or on a closed, non-public private LTE/5G network. quectel change imei
The most frequently used command for modern Quectel modules (like the , RM500U , or RM520N ) is AT+EGMR : Query current IMEI : AT+EGMR=0,7 Write new IMEI : AT+EGMR=1,7,"[15-digit-IMEI]"
Comprehensive Guide to Quectel IMEI Modification: Methods, Commands, and Legal Implications
Quectel is a leading provider of wireless communication modules, including GSM, UMTS, LTE, and 5G modules. These modules are widely used in various applications, such as IoT devices, industrial automation, and consumer electronics. One common requirement for using Quectel modules is to change the IMEI (International Mobile Equipment Identity) number, which is a unique identifier assigned to each mobile device. In this article, we will explore the concept of IMEI, the reasons for changing it, and a step-by-step guide on how to change the IMEI on Quectel modules. On most Quectel modules, the IMEI written by
The old RDA chips are trivial to change.
To read the current IMEI of any Quectel module, the standard 3GPP command is used. This command is safe and universally supported. AT+CGSN Use code with caution. Response: 86043404xxxxxxx OK Use code with caution.
This method works on popular modules like the , EC25 , and EP06 . Change IMEI Number on Android Devices | PDF - Scribd The Ghost Device Only perform identity simulation testing
The very first step is to record the current IMEI. Use one of the following AT commands:
If the module returns an error, it may be because the modem interface is active or connected to a WAN. Disconnecting active network cables or disabling the data connection often allows the write command to succeed.
AT+EGMR=1,7,"IMEI_SIM1" AT+EGMR=1,10,"IMEI_SIM2"
On engineering samples, unlocked development modules, or specific OEM firmware variants, Quectel provides the AT+EGMR command to execute write operations to the NVRAM. The standard syntax for writing a new IMEI is: AT+EGMR=1,7,"15_DIGIT_IMEI_HERE" Use code with caution. Step-by-Step Execution Example:
Quectel modules typically utilize a Qualcomm or MediaTek baseband chipset. The IMEI is stored in a protected area of NVRAM (Non-Volatile Random Access Memory). Access to this memory is typically restricted to factory calibration tools or authorized service centers to prevent tampering.