Download File S706c-7731-d2(168)-v1.0.part1.rar May 2026

A .pac firmware file, USB drivers, and a flashing tool like SPD Upgrade Tool or Infinity-Box software. Usage Instructions

Ensure your device's motherboard ID matches "s706C-7731-D2" exactly. Flashing the wrong version can permanently damage (hard brick) your hardware. Download File s706C-7731-D2(168)-V1.0.part1.rar

Install the Spreadtrum USB Drivers on your PC so the computer can recognize the device in "Download Mode." Flash the Firmware: Open the SPD Upgrade Tool (also known as ResearchDownload). Load the .pac file extracted from your archive. Click the "Play" or "Start" button. A .pac firmware file