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android-firmware-field-guide

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This guide provides instructions on installing firmware for Xiaomi China and Huawei China devices that want to switch to global firmware.

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# Android Firmware Field Guide & Banking App Fixes

<br/>

<div align="center">
  🌐 <b>Language / Ngôn ngữ:</b>
  &nbsp;&nbsp;
  <kbd><b>🇺🇸 English</b></kbd>
  &nbsp;&nbsp;•&nbsp;&nbsp;
  <kbd><a href="README.vi.md">🇻🇳 Tiếng Việt</a></kbd>
</div>

<br/>

A community-maintained, beginner-friendly guide to flashing international ROMs on Chinese Android devices (Xiaomi, Huawei) and fixing banking app detection issues on unlocked bootloaders.

---

## 🗺️ Step-by-Step Workflow

```mermaid
flowchart LR
    Step0["Step 0: Unlock Bootloader"] --> Step1["Step 1: Preparation"]
    Step1 --> Step2["Step 2: Download ROM"]
    Step2 --> Step3["Step 3: Flash ROM"]
    Step3 --> Step4["Step 4: Root & Fix Banking"]
    
    style Step0 fill:#ffb,stroke:#333,stroke-width:2px
    style Step1 fill:#f9f,stroke:#333,stroke-width:2px
    style Step2 fill:#bbf,stroke:#333,stroke-width:2px
    style Step3 fill:#fbf,stroke:#333,stroke-width:2px
    style Step4 fill:#bfb,stroke:#333,stroke-width:2px
```

0. 🔓 **[Step 0: Unlock Bootloader](guides/en/00-unlock-bootloader.md)**
   * Apply for unlocking permission on Xiaomi Community (HyperOS).
   * Daily 00:00 GMT+8 quota request resets.
   * Bind Mi account in Developer Options.
   * Use Mi Unlock Tool on PC & wait out the 168-hour timer.

1. 💻 **[Step 1: Prepare device & setup tools](guides/en/01-preparation.md)**
   * Set up Platform-Tools, USB Drivers (Windows).
   * Enable USB Debugging on the phone.
   * Identify device codename.

2. 📥 **[Step 2: Choose and download the correct ROM](guides/en/02-download-rom.md)**
   * Differentiate between Fastboot ROMs (`.tgz`) and Recovery ROMs (`.zip`).
   * Select ROM region (CN, Global, EEA, EU).
   * Verify SHA-256 integrity.

3. ⚡ **[Step 3: Flash ROM](guides/en/03-flash-rom.md)**
   * Boot into Fastboot/Bootloader mode.
   * Understand and run flash scripts (`flash_all.bat` / `flash_all.sh`).
   * **Critical warnings regarding bootloader relocking**.
   * Troubleshoot bootloops and modem/signal issues.

4. 🛡️ **[Step 4: Root & Fix Play Integrity (Banking Apps)](guides/en/04-root-fix-banking.md)**
   * Root using Magisk / KernelSU / APatch.
   * Install modules: Zygisk + Shamiko + Play Integrity Fix.
   * Rename Magisk app package & configure DenyList.
   * Hide apps list using LSPosed + HideMyApplist for strict banking apps (Techcombank, Vietcombank...).

---

## 📱 Device-Specific Profiles

Some newer models (e.g. Xiaomi 15 Ultra) require extra partition flashing to fix cellular signal, Bluetooth, or NFC after region switching:

| Brand | Model Name | Codename | Custom Guide & Patches |
|---|---|---|---|
| Xiaomi | Xiaomi 15 Ultra | `xuanyuan` | [Xiaomi 15 Ultra Profile](devices/xiaomi/xuanyuan/README.md) |

---

## 🤝 Contributing

We welcome reports and contributions from the community.
- See contribution guidelines: [CONTRIBUTING.md](CONTRIBUTING.md)
- View test matrix files: [data/device-test-matrix.csv](data/device-test-matrix.csv) and [data/banking-app-test-matrix.csv](data/banking-app-test-matrix.csv).

---

## 📄 License

This project is licensed under the MIT License. See [LICENSE](LICENSE) for details.

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