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You can learn important system design concepts for free, covering topics like scalability, availability, CAP theorem, caching, databases, APIs, microservices, and distributed systems. This resource offers clear explanations, interview preparation guides, and practical design problems from easy to hard, helping you understand how to build reliable, scalable software systems. It also provides links to courses, books, newsletters, and videos to deepen your knowledge. Using these materials can improve your skills for system design interviews and real-world software architecture, making you more confident and effective in designing complex systems.
https://github.com/ashishps1/awesome-system-design-resources
halogenOS - Official | Android 16 | Nothing Phone (2)
✍️ Details:
- Version: 16.2
- Codename: #Pong
- Updated: 26/05/02
- Type: #Vanilla
🔽 Download: Here
🆘 Support : Here
⚙️ Installation: Here
🔖 Tags : #ROM#AOSP#Official#XOS
✍️ Changelog:
- Dimmed mode
- New launcher app drawer design
- Slidable tiles
- Battery charge limit
- Add font customization
- Add centered lockscreen clock style
- Add VRR mode
- April 2026 Security Patch
- Increase Bluetooth sound quality when using AAC or SBC
✍️ Note:
- Firmware is not included, based on NOS B4.0-251226-1110
- ROM is signed by official halogenOS keys. GApps support and PI not guaranteed (only vanilla with Sandboxed Play is officially supported).
🏆 Credits:
- Chandu
- Pong dev team & testers
- halogenOS Community
👤 Maintainer : @N0m4n904
🔔 Updates : @NothingPhone2Updates
💬 Chat : @NothingPhone2
HalogenOS - Official | Android 16 | Nothing Phone (2)
✍️ Details:
- Version: 16.0
- Codename: #Pong
- Initial Release: 25/09/25
- Type: #Vanilla
🔽 Download: Here
🆘 Support : Here
⚙️ Installation: Here
🔖 Tags : #ROM#AOSP#Official#XOS
✍️ Note:
- Kernel is prepatched KSU
- Firmware is not included, latest is recommended
- ROM is signed by official halogenOS keys. GApps support and PI not guaranteed (only vanilla is officially supported).
- Refer to this post for future updates related to the ROM.
🏆 Credits:
- Chandu for Kernel (and DT which served as as a reference)
- Pong dev team & Testers
👤 Maintainer : @N0m4n904
🔔 Updates : @NothingPhone2Updates
💬 Chat : @NothingPhone2
HalogenOS - Official | Android 16 | Nothing Phone (2)
✍️ Details:
- Version: 16.0
- Codename: #Pong
- Initial Release: 18/08/25
- Type: #Vanilla
🔽 Download: Here
🆘 Support : Here
⚙️ Installation: Here
🔖 Tags : #ROM#AOSP#Official#XOS
✍️ Note:
- Kernel is prepatched KSU
- Firmware is not included, latest is recommended
- ROM is signed by official halogenOS keys. GApps support and PI not guaranteed (only vanilla is officially supported).
- Refer to this post for future updates related to the ROM.
🏆 Credits:
- Chandu for Kernel (and DT which served as as a reference)
- @chrome6boy for testing
- Pong dev team
👤 Maintainer : @N0m4n904
🔔 Updates : @NothingPhone2Updates
💬 Chat : @NothingPhone2
AviumUI - Unofficial | Android 16 | Nothing Phone (2)
📝 Details:
- Version: 16
- Build type: #Vanilla
- Device: #Pong
- Released: 27/11/2025
⬇️ Downloads: Here
📖 Changelogs: Here
🖼️ Screenshota: Here
🏷 Tags: #Avium#ROM#Avium#Vanilla#Unofficial
✍️Notes:
- Vanilla build ONLY
- Initial Nothing camera support available
- SukiSU Ultra and SusFS baked in
- OTA updates are planned in the future, however not supported as of now
- Signed with my keys
- Based on Lineage DT, Vendor and Kernel
- Use latest NOS 3 firmware
- If face any bugs report with logs
🏆Credits:
- Deadlylxrd for so much help with building my first ever ROM
- Chandu for DT
- Fabian & HELLBOY for Glyph
👤 Maintainer: @sevo9128
💬 Chat: @NothingPhone2
🔔 Updates: @NothingPhone2Updates
Лучше выбери свой аромат в парфюмированных гелях NOTALONE, которые привлекают любовь!
Vanilla Lovers - влюбленность
Black pepper Neroli- страсть
Bergamot Amber Wood - глубина
#notalone#парфюмированныйгельдлядуша#blackpepper#vanilla#bergamot
LineageOS - Community | A14 | Nothing Phone (2)
✍️ Details:
- Version: 21.0
- Codename: #Pong
- Released: 17/07/2024
🔽 Download : Recovery | Fastboot
⚙️ Installation: Here
📸 Screenshots: Here
🆘 Support: Telegram
🔖 Tags : #ROM#Vanilla#Community#LOS#QPR3#U#NothingPhone2
✍️ Changelog
- Update from NOS 2.6.0
- USB OTG Fixed
- Fixed Status Bar Padding
- Read Notes 👇
✍️ Notes
- Flash These GAPPS to get Gapps with Pixel Launcher
- Stable Signed Build
- Meteoric kernel is baked in with prepatched KSU.
- Dolby Atmos Included
🏆 Credits
- Chandu for base device tree
- HellboyforMeteoric kernel
- Miki, Unluck & Ghost for all help
- Fabian for PA Glyph Implementation
😎 Maintainer: @Kartikey
🔔 Updates: @NothingPhone2Updates
💬 Chat: @NothingPhone2