Quectel Ec25 Change Imei May 2026

After the procedure, verify the change by querying the modem:

AT+CGSN

Compare the output with your written IMEI. Then, attempt a network registration:

AT+COPS=?

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 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).

Searching for the phrase "quectel ec25 change imei" typically leads to fragmented information: half-working AT commands, warnings about legal issues, or outdated firmware guides.

This article aims to be the definitive guide. We will cover why 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).

Crucial Disclaimer: 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.

Changing the IMEI of a Quectel EC25 module typically involves using AT commands. AT commands are a set of standard commands used to control a modem. Here’s a general guide on how to do it:

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

Once connected, type:

AT

The module should reply:

OK

If not, check power, wiring, and drivers.

Before running commands, understand the legitimate use cases: