The primary interface utilized for flashing firmware files ( .pac format) when the device is in Download/BOOTROM mode. Technical Specifications Driver Version R4.20.0001 (Latest Stable) Supported Chipsets Unisoc / Spreadtrum (SC, Tiger series) File Type Executable Setup / Compressed Zip Repack Architecture Support x86 (32-bit) and x64 (64-bit) Compatible OS Windows 7, Windows 8, Windows 10, Windows 11 Step-by-Step Installation Guide
(Disable driver signature enforcement) before retrying the installation. Key Resources Official/Reliable Sources : While various third-party sites like Xiaomi Tools HardReset.info
Upon reboot, press or F7 on your keyboard to select "Disable driver signature enforcement." Step 2: Extract and Run the Repack
Follow the on-screen prompts. The repack will automatically install both the drivers and any necessary Microsoft Visual C++ redistributable dependencies. Step 3: Verify the Installation in Device Manager To ensure your computer correctly recognizes your phone: spd driver r420 download repack
Open the extracted folder and navigate to the directory matching your computer architecture: Use for 64-bit systems. Use x86 for 32-bit systems.
1. Error: "The third-party INF does not contain digital signature information"
SPD Driver R4.20.0001 (often referred to as the Spreadtrum driver) is a critical software component required for Windows computers to communicate with mobile devices powered by Spreadtrum/UNISOC chipsets. A "repack" version typically bundles several driver versions or architectures into a single, automated installer to simplify the setup process for flashing firmware or unlocking devices. www.azeiteseolivais.com.br Key Features & Use Cases Device Connectivity: The primary interface utilized for flashing firmware files (
This creates a clean, redistributable repack you control.
Open on your PC (Right-click Start > Device Manager). Power off your Spreadtrum/Unisoc phone completely.
Open your flashing software (e.g., SPD Upgrade Tool) and press the button before connecting the USB cable to the phone. Error Code 10 or Code 43 in Device Manager The repack will automatically install both the drivers
If you own a smartphone or tablet powered by a Spreadtrum (now Unisoc) chipset, you have likely encountered the need to connect your device to a PC for flashing, debugging, or transferring files. However, Windows often fails to recognize these devices out of the box, leading to device connection issues in tools like SPD Factory Tool or UpgradeDownload.
Extract the downloaded source archive using a tool like WinRAR or 7-Zip. Right-click on the SPD_Driver_R4.20.0001_Repack.exe file. Select . Choose your preferred language and click Next .
: Contains drivers for both 32-bit (x86) and 64-bit (x64) Windows systems.
The "SPD Driver R4.20" is not a standard driver for everyday use. You would not find it on a manufacturer's support page for a retail phone. Instead, it is a piece of targeted at:
If the device only shows a charging icon instead of connecting to the flash tool, it usually indicates the drivers are not correctly installed. Sources for "Repack" Versions