If you download the wrong version for your specific model (e.g., using a US firmware on a European model), you can "brick" the device, making it permanently unfunctional. 5. Common Sources Google Pixel: Official Factory Images
Specific USB drivers from companies like Samsung, Google, or OnePlus so your PC recognizes the phone. android boot loader download
The actual system files (often in .img or .bin format) that you intend to "flash" onto the device. 4. The Risks (The "Catch") If you download the wrong version for your specific model (e