Remember these golden rules:
📦 Firmware Package (RM-217) ├── 📄 MCU (Micro Controller Unit) --> Main operating system engine ├── 📄 PPM (Post Program Module) --> Language packs & dictionary fonts └── 📄 CNT (Content Pack) --> Factory themes, ringtones & gallery
A clean flash completely resolves issues where the phone boots into a blank white screen but plays the startup sound.