: Flashing will completely wipe the internal storage. Backup photos, contacts, and important documents.
Browse to your downloaded firmware folder, select the .pac file target, and click . Wait for the loading bar to fill as the utility maps out the individual system files. Step 3: Establish Device Connection Power off your phone or tablet completely.
Download and install the Spreadtrum/Unisoc USB Driver on your PC. Without this, the tool will not detect the device in download mode. Step-by-Step Guide to Using SPD Flash Tool R4.0.0001 Step 1: Extract the Tool and Firmware spd flash tool r400001
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Open the extracted tool folder, locate the or UpgradeDownload.exe file, right-click it, and select Run as administrator . Step 3: Load the PAC Firmware : Flashing will completely wipe the internal storage
: Works with a variety of Spreadtrum-powered hardware, including smartphones, tablets, and feature phones. Essential Requirements
Right-click on UpgradeDownload.exe and select . Step 3: Load the PAC Firmware File Wait for the loading bar to fill as
: Click the "Start" button (play icon), power off your device, and connect it to the PC while holding the (usually Volume Down or Volume Up). Completion : A "Passed" message in green indicates a successful flash. Common Troubleshooting UART Send Error
To never see SPD Flash Tool R400001 again:
Enable USB debugging on your device by going to Settings > Developer Options > USB Debugging.
When the process finishes successfully, a green or Finish message will appear in the status column. Click the Stop icon (Square button) in the tool, disconnect your USB cable, and power on your mobile device. Note that the initial boot up may take up to 10 minutes. Troubleshooting Common Errors