Quectel Ec25 | Change Imei Verified

| Item | Specification | | :--- | :--- | | | Any variant (EC25-A, E, V, AU, etc.) with firmware version EC25ECCAR01A08M4G or newer | | USB-to-UART Adapter | CP2102 or FTDI (3.3V logic – do NOT use 5V) | | Power Supply | 3.8V – 4.2V DC at 2A peak | | SIM Card | Active SIM (required for network write operations) | | Antenna | Primary LTE antenna (for signal lock during write) | | Terminal Software | PuTTY, minicom, or Serial Port Utility (115200 baud, 8N1) | | IMEI Generator | Use luhn algorithm to calculate valid check digit |

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. quectel ec25 change imei