Flashing a Stock ROM will wipe your internal storage. Backup photos, contacts, and messages.
Go to Settings > About Phone > Software Information and tap "Build Number" seven times. Then, go to Developer Options and enable USB Debugging and OEM Unlocking . Step-by-Step Installation Guide Step 1: Download the Stock Firmware official samsung galaxy a20 sma205f ds stock rom
The Stock ROM (Firmware) is the official operating system developed by Samsung specifically for your device model. Reinstalling it can solve several critical issues: Flashing a Stock ROM will wipe your internal storage