The Quectel EC25 is a widely used LTE Cat 4 module embedded in thousands of industrial routers, IoT gateways, and telematics devices. For network administrators, hardware developers, and lab engineers, modifying or restoring the International Mobile Equipment Identity (IMEI) is sometimes necessary. This need arises during device provisioning, laboratory testing, or when recovering a corrupted firmware partition.
The Quectel EC25 is a workhorse of the IoT world—a compact LTE module that breathes connectivity into everything from industrial routers to vending machines. But tucked within its digital DNA is a fifteen-digit sequence known as the IMEI (International Mobile Equipment Identity). In the world of telecommunications, this number is more than an ID; it is a digital fingerprint. To ask how to change it is to step into a fascinating intersection of hardware engineering, cybersecurity, and legal grey areas. The Digital Fingerprint
The module should reply:
If the module responds with OK , the command was successfully accepted. Alternative Command for Specific Firmware Versions quectel ec25 change imei
AT+EGMR=1,7,"your_new_15-digit_IMEI_here"
To understand how to change the IMEI, one must understand where it is stored. The Quectel EC25 is a LTE Cat 4 module commonly used in IoT devices, industrial gateways, and consumer routers (like those from GL.iNet or TP-Link).
If it returns a list of operators, the IMEI is structurally valid and accepted by the radio hardware. If it returns +CME ERROR: no network service , the IMEI may be blacklisted or invalid. The Quectel EC25 is a widely used LTE
Legitimate reasons a developer or engineer might consider altering an IMEI include:
This reboots the module, forcing it to re-initialize its baseband stack and broadcast the newly assigned identity upon its next network registration attempt. Important Legal, Carrier, and Compliance Risks
There are two primary methods to write an IMEI: The Quectel EC25 is a workhorse of the
Verify that the output matches your newly inputted 15-digit IMEI. Troubleshooting Common Errors
A Quectel EC25 module mounted on a PCIe evaluation board or inside a compatible router.
The terminal will display a 15-digit number. Copy and save this string safely. If anything goes wrong, you will need this original number to restore functionality. Check Firmware Version
: Unauthorized writing to the EFS partition can result in the modem entering a "comatose" state where it fails to register on a network or stops responding to AT commands entirely. No Official Support