Android OS Repair Needed

My Android phone has stopped booting altogether—the operating system will not load past the splash screen—and I need it back in working order without losing my personal data. I am looking for a specialist who regularly handles deep-level Android software recovery, including tasks such as flashing or re-flashing stock or custom ROMs, repairing corrupted partitions, and dealing with boot-loop or soft-brick scenarios. Familiarity with ADB, Fastboot, OEM-specific tools (e.g., Odin or SP Flash Tool), and secure data-backup methods is essential so that any repair steps preserve photos, contacts, and app data wherever possible.

Deliverables
• A fully functional, booting device on the latest stable build appropriate to my model
• Verification that core services (calls, SMS, Wi-Fi, Bluetooth, Play Store) work correctly
• A brief summary of the steps taken and any files used, so I can reproduce or undo them if needed

I can provide the exact model number, current firmware version (if readable), and any error messages once we start. Let me know your estimated turnaround time and any prerequisites you may need from my side.