The ability to change the IMEI is a testament to the flexibility of the Quectel EC25, but it is a double-edged sword. Wield it carefully.
| 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 |
Introduction: Why This Topic Matters The Quectel EC25 series is one of the most popular LTE cat-4 modules on the market. Used in everything from industrial routers and vehicle trackers to Raspberry Pi IoT projects, its versatility is unmatched. However, one topic that generates constant discussion in forums and technical circles is the IMEI (International Mobile Equipment Identity) . quectel ec25 change imei
The Quectel EC25 (variants: EC25-A, EC25-E, EC25-AU, EC25-V, etc.) comes pre-programmed with a factory IMEI. Usually, this is printed on a sticker on the module’s shielding. By default, this IMEI is read-only via standard AT+CGSN commands.
Searching for the phrase typically leads to fragmented information: half-working AT commands, warnings about legal issues, or outdated firmware guides. The ability to change the IMEI is a
Changing the IMEI of a cellular module is illegal in many jurisdictions (including the US, EU, and China) if done with intent to defraud, bypass network blocks, or hide a stolen device. This guide is for educational purposes, legacy system integration, and testing in controlled lab environments where you own the hardware and have explicit permission from your network provider. Part 1: What is the Quectel EC25 IMEI? The IMEI is a 15-digit unique identifier for cellular hardware. Mobile networks use it to authorize devices, block stolen units, or enforce data plan limits.
AT+QPRTPARA=3 # Enter engineering mode For EC25 firmware versions EC25ECCAR01A08M4G and later, use: Used in everything from industrial routers and vehicle
This article aims to be the definitive guide. We will cover you might need to change the IMEI, the legal and ethical boundaries , the technical prerequisites , and the exact step-by-step commands (using both standard and manufacturer-specific AT instructions).