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On older Quectel modules (like M95 or M66), a hidden AT command may work:

For modules based on Qualcomm chipsets, the QMI protocol allows direct communication with the baseband. Tools such as QPST (Qualcomm Product Support Tools) can be used to access the NVRAM items.

Technically, Quectel modules often interact with users through a series of "AT" (Attention) commands. For many of their LTE and 5G modules, such as the , the specific command used to read or write the IMEI is telecomHall IMEI modification on EG25G - Quectel Forums

7 : Specifies the internal register corresponding to the primary IMEI.

The International Mobile Equipment Identity (IMEI) is a unique 15-digit serial number assigned to every cellular device. For network operators, this number serves as a digital fingerprint to identify valid devices, manage network traffic, and block blacklisted hardware.

Aisha decided to write a “useful story” for her team’s internal wiki — not a guide to change IMEIs, but a cautionary tale on how to detect and prevent it.

I understand you're looking for a story involving "Quectel change IMEI" — likely referring to Quectel wireless modules (used in IoT devices) and the concept of changing their International Mobile Equipment Identity (IMEI) numbers.