A terminal emulator such as PuTTY, Tera Term, QCOM, or Minicom.
: A serial terminal emulator (e.g., QCOM, PuTTY, or Tera Term).
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
Some firmware versions require unlocking the engineering mode before writing to the NVRAM. AT+QPRTPARA=3 Use code with caution. quectel ec25 change imei
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
echo -ne "AT+QFASTBOOT\r" > /dev/ttyUSB2
It is a powerful tool for hardware developers and network testers, but a dangerous weapon for fraudsters. Always adhere to local laws and carrier terms of service. A terminal emulator such as PuTTY, Tera Term,
Beyond AT commands and fastboot, there are other low-level methods used by engineers and hobbyists. These methods involve working with QCN files, which contain the complete factory configuration of a modem, including the IMEI, serial number, RF calibrations, and other NV items.
The Quectel EC25 series is a family of LTE Cat 4 wireless communication modules widely used in Internet of Things (IoT) devices, automotive telematics, industrial routers, and portable hotspots. Each module is factory-assigned a unique International Mobile Equipment Identity (IMEI) number—a 15-digit code that serves as the device’s unique identifier on cellular networks. Under normal circumstances, the IMEI is permanent and non-changeable. However, advanced users, developers, and sometimes unauthorized individuals may seek to alter this identifier. This essay provides a detailed technical examination of why, how, and under what conditions the IMEI on a Quectel EC25 module can be changed, the commands involved, and the associated risks.
Changing the IMEI (International Mobile Equipment Identity) of a Quectel EC25 module is a procedure typically used by developers for testing, debugging, or restoring a device to its original state if the NVRAM has been corrupted. This link or copies made by others cannot be deleted
If the module shows the correct IMEI but refuses to connect to the network ( AT+CREG? returns 0,2 or 0,0 ), the new IMEI may fail the network's Equipment Identity Register (EIR) check, or the IMEI checksum digit (the 15th digit) was calculated incorrectly.
The IMEI is a unique 15-digit code used to identify GSM, WCDMA, and LTE devices on a mobile network. In Quectel modules like the EC25, this identifier is typically stored in the non-volatile (NV) memory. From a technical standpoint, modifying the IMEI is usually achieved through specific (Attention Commands) while the device is in a specialized mode, such as USB modem or "emergency" mode.
Open your operating system's device manager to identify the correct COM port. Look for the . Open your serial terminal emulator (e.g., PuTTY or QCOM). Configure the serial settings: Baud Rate: 115200 (default for most Quectel modules) Data Bits: 8 Parity: None Stop Bits: 1 Flow Control: None Step 2: Verify Current Module Status