Quectel Ec25 Change Imei ((new)) -

Changing the International Mobile Equipment Identity (IMEI) of a Quectel EC25 module is technically possible through specific commands, but it is strictly restricted by the manufacturer and is in many jurisdictions. Quectel Forums Technical Methods

5. The Luhn Algorithm (Checksum Validation)

You cannot simply type 15 random numbers. An IMEI is validated by the Luhn algorithm (Mod 10). If you write an invalid IMEI, the modem may accept it, but the cellular tower will reject the registration request (Location Update Reject). quectel ec25 change imei

Step 4: Handle Firmware Write-Protection

If you receive ERROR, your module is write-protected. You must disable protection via USB Diag port (not the standard AT port). Connect to the diagnostic port (usually USB interface 2 or 3) and send: 1 – indicates write operation

Changing the IMEI of a Quectel EC25 module is primarily used for IMEI repair—restoring a valid ID after firmware corruption—or to ensure compatibility with specific carrier whitelists. Technical Methods for IMEI Modification On Linux (using Screen or Minicom): ls /dev/ttyUSB*

Risks: One wrong byte can brick the module. QFIL is unforgiving – no “undo”. Requires vendor-specific firehose programmers (.mbn files), which are not publicly available for EC25 without an NDA with Quectel.

• 1 – indicates write operation.
• 7 – is the identifier for the IMEI storage location.
• "new_imei" – the 15-digit replacement.

On Linux (using Screen or Minicom):

ls /dev/ttyUSB*   # Typically ttyUSB2 is the AT port
sudo screen /dev/ttyUSB2 115200

Quectel EC25 series is a popular industrial-grade LTE Cat 4 module. While it is technically possible to modify the International Mobile Equipment Identity (IMEI), it is not a "documented feature" in the official Quectel manuals. In fact, Quectel explicitly states they do not provide commands for this purpose to standard users. Quectel Forums