Click on the file selection buttons (MCU, PPM, CNT) to load the corresponding firmware files from your downloaded flash file folder.

: This is a very common issue. If the Infinity software detects the phone is in "Charge mode" instead of "DIAG mode," try these fixes:

Click the "Flash" button in the software. The software will detect the device and start the process.

Install the USB drivers and the Infinity BEST software.