Connect your Spreadtrum phone to the PC using a USB cable while holding down the or Volume Down key.

The SPD Driver R420 (Spreadtrum Driver) is a dedicated software package that allows Windows operating systems to communicate with devices running on Spreadtrum/Unisoc chipsets.

Finding the correct SPD (Spreadtrum) driver for an R420 device is essential for flashing firmware, removing screen locks, or repairing IMEI issues. Without a verified driver, your PC will not recognize the device when it is in Download or Diagnostic mode.