Custom Android ROM & Recovery for Samsung Galaxy A15 5G

This project contains a custom Android ROM and custom recovery built for the Samsung Galaxy A15 5G, focused on performance, efficiency, and system stability.

✨ Features

• Performance Optimizations: Kernel and system tweaks for smoother multitasking and faster responsiveness.
• Custom Recovery: Flash firmware, perform backups, and restore your device safely.
• Resource Efficiency: Optimized background processes and memory usage for better device longevity.
• Reproducible Builds: Automated build pipeline with Linux shell scripts and Git.

🛠️ Technical Highlights

• Based on AOSP (Android Open Source Project) with device-specific modifications.
• Kernel compilation and device tree customization for Samsung Galaxy A15 5G.
• Debugging and optimization using profiling and benchmarking tools.
• Partition and boot image management.

📥 Downloads

• Recovery (TWRP 3.7.1_12): twrp-3.7.1_12-a15x.tar
• VBMeta: vbmeta.img
• ROM: Download ROM from Google Drive

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🔓 Unlock Bootloader & Flash TWRP on Samsung Galaxy A15 5G (Using Odin)

⚠️ Warning: Unlocking the bootloader will erase all data on your device. Back up your data before proceeding. Flashing custom recovery may void your warranty. Proceed at your own risk.

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1. Prerequisites

• A Windows PC
• Samsung USB drivers installed: Download here
• Odin tool (latest version): Download here
• USB cable
• TWRP recovery .tar file for Galaxy A15 5G
• Fully charged phone (≥50%)

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2. Enable Developer Options

1. Go to Settings → About Phone → Software Information
2. Tap Build Number 7 times until you see “Developer mode enabled”.
3. Go back to Settings → Developer Options.
4. Enable:
   • OEM Unlocking
   • USB Debugging

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3. Unlock Bootloader

1. Power off your phone.
2. Boot into Download Mode:
   • Press and hold Volume Up + Volume Down simultaneously.
   • Connect your phone to the PC via USB.
   • Press Volume Up to confirm unlocking the bootloader.
3. Your phone will erase all data and reboot once unlocking is complete.

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4. Flash TWRP via Odin

1. Boot your phone into Download Mode:
   • Power off → Press Volume Down + Power (or Volume Down + Volume Up depending on model).
   • Press Volume Up to continue.
2. Open Odin on your PC.
3. Connect your phone via USB. Odin should detect your device (ID:COM will turn blue).
4. Click AP in Odin and select the twrp-3.7.1_12-a15x.tar file.
5. Make sure F. Reset Time is checked and Re-Partition is unchecked.
6. Click Start to flash TWRP.
7. Once completed, Odin will show PASS!, and your device will reboot.

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5. Boot into TWRP

1. Immediately after flashing, boot into TWRP recovery to prevent stock recovery from overwriting it:
   • Power off → Press Volume Up + Power simultaneously.
2. You are now in TWRP recovery. From here, you can flash VBMeta and your ROM.

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6. Notes

• Always boot into TWRP first after flashing.
• Do not boot into the system before flashing VBMeta or ROM, as it may overwrite TWRP.
• Use the Backup option in TWRP to create a Nandroid backup before flashing the ROM.

🚀 Getting Started

1. Clone the repository:

   git clone https://github.com/your-username/galaxy-a15-rom.git