To fix issues like "stuck on logo" or software bugs, the process generally involves these steps:

Avoid “custom” or “modified” flash files unless you are an expert. Always source the firmware from reputable repositories like Samsung’s official servers (via Frija), SamMobile, or trusted community archives.

The software installed on your PC that allows you to transfer the flash file onto the phone via USB. Requirements for Flashing Samsung GT-C3520 Before starting, gather the necessary tools:

The flash file contains the operating system for the phone.