the latest 4-file firmware specifically for SM-J250F (Ensure the PDA/AP version contains ...U2... ) from a trusted source. Install Samsung USB Drivers on your PC.
If the firmware flash does not resolve the issue, it may be a more deeply corrupted partition or a hardware failure. Go to Settings > Apps > Camera . Select Storage and tap Clear Cache and Clear Data . Safe Mode Troubleshooting: samsung-j250f-u2-camera-failed-fix-firmware
Restart your device. When the Samsung logo appears, hold until the lock screen appears. "Safe Mode" will appear in the corner. the latest 4-file firmware specifically for SM-J250F (Ensure
Have you tried already, and if so, did you get an error in Odin? If the firmware flash does not resolve the
A bad Android system update can lead to corrupted camera drivers. Required Tools for Firmware Fix Computer (Windows recommended) Samsung USB Drivers Odin3 Flashing Tool (Version 3.13.1 or higher)