Updated: Imei Proinfo

IMEI (International Mobile Equipment Identity): A unique 15-digit code used to identify mobile devices on cellular networks.

2. User Stories

• As an Inventory Manager, I want to correct a typo in an IMEI number so that the device is trackable.
• As a Service Technician, I want to update the IMEI after a mainboard replacement so that the system reflects the new hardware identity.
• As a System Admin, I want to prevent duplicate IMEI entries during an update to avoid data conflicts.

4.2. Sequence of an “IMEI ProInfo Updated” Event

1. AT Command – AT+EGMR=1,7,"IMEI_1" (MediaTek) or AT+WRITEIMEI (others).
2. RIL daemon (rild) receives command → passes to modem via shared memory (QMI for Qualcomm, SIPC for MediaTek).
3. Modem firmware validates:

   Call Failed.

   • IMEI (International Mobile Equipment Identity): This is a 15-digit unique serial number for every cellular device. It acts as the phone’s digital fingerprint, allowing carriers to block stolen devices and authenticate network access.
   • Proinfo (or Persistent Info): In the context of Android devices (particularly MediaTek and Spreadtrum/Unisoc chipsets), the Proinfo partition is a hidden storage area. It contains the device's original IMEI numbers, Wi-Fi MAC addresses, Bluetooth addresses, and serial numbers. Think of it as the "birth certificate" of the device’s connectivity hardware.

   One-line CSV-style "[imei],[model],[maker],[operator],[status],[YYYY-MM-DD],[notes]" imei proinfo updated

   Kevin went into the settings and scrolled down to 'About Phone.' He looked at the IMEI number. It read: 000000000000000. As an Inventory Manager , I want to