IT interventions

Bootloader Unlocking, Android 15 Reflashing and Battery Connection Repair – Redmi Note 9 Pro

Complete intervention on a Redmi Note 9 Pro: bootloader unlocking, reflashing from Android 12 to Android 15 with LineageOS, Google Play setup and repair of battery connections.

Image from the project „Android 15 re-flashing and Redmi Note 9 Pro battery connection repair” — 1

Reflashing and repair for Redmi Note 9 Pro

Software and hardware intervention performed on a Xiaomi Redmi Note 9 Pro, with the objective of updating the phone's system to Android 15 and fixing existing battery connection issues.

The problem and the objective

The phone required a complete solution, including unlocking the bootloader, reinstalling the operating system and checking the hardware connections of the battery. The goal was to obtain a modern, functional and stable system, along with fixing the hardware issue.

The delivered solution

unlocking the bootloader;
installing LineageOS 22.2 based on Android 15;
setting up LineageOS Recovery;
configuring Google Play services and applications;
using ADB and Fastboot for software operations;
disassembling the phone and checking the battery connections;
fixing the connections and reassembling the device;
testing the system and verifying final operation.

The verifiable result

The Redmi Note 9 Pro was brought back to working condition, with LineageOS 22.2 / Android 15 installed, Google Play configured and battery connections repaired.

The project demonstrates a complete intervention, combining advanced Android reflashing with device hardware diagnostics and repair.