If your OPPO A71 (CPH1717) is dead, stuck on the logo, experiencing flashing errors, or showing “Baseband Unknown” after a firmware flash, it indicates a software issue. Here’s a step-by-step guide to fix the problem:
1. Understand the Problem
- Dead Device: The phone doesn’t turn on at all.
- Stuck on Logo: The phone boots but gets stuck on the OPPO logo.
- Flashing Errors: Errors occurred during the firmware flash process.
- Baseband Unknown: The modem/baseband is corrupted or missing.
2. Tools You’ll Need
- A Windows PC.
- SP Flash Tool (for MediaTek devices).
- OPPO USB Drivers (install them on your PC).
- A working USB cable.
Step 1: Download Firmware and Tools
Name oppo_a71_cph1717_dead_baseband_unknownfix_firmware_by_twcd.zip
Size : 2.2 gb
password :twcd
Download : here
Step 2: Install USB Drivers
- Install the latest OPPO USB drivers on your PC. You can download them from the official OPPO website or use a tool like Mediatek USB VCOM Drivers.
Step 3: Use SP Flash Tool
- Download and Install SP Flash Tool:
- Download the latest version of SP Flash Tool from a trusted source.
- Extract the firmware file you downloaded (it should contain scatter files, recovery, boot, system, etc.).
- Open SP Flash Tool:
- Launch SP Flash Tool on your PC.
- Click on the Scatter-loading button and load the scatter file from the extracted firmware folder.
- Select Download Mode:
- In SP Flash Tool, select Download Only or Firmware Upgrade mode (avoid Format All + Download unless necessary).
- Connect Your Phone:
- Power off your OPPO A71 completely.
- Remove the battery (if removable) or wait for the device to discharge fully.
- Press and hold the Volume Up or Volume Down button (depending on your device) and connect it to the PC via USB cable.
- SP Flash Tool should detect your device in Preloader Mode.
- Start Flashing:
- Click the Download button in SP Flash Tool to start flashing the firmware.
- Wait for the process to complete. A green circle will appear when done.
- Disconnect and Reboot:
- Disconnect your phone and power it on. It should boot up normally.
4. Fix Baseband Unknown
If the baseband is still unknown after flashing:
- Re-flash the Firmware: Ensure you’ve flashed the correct firmware version.
- Flash Modem/Baseband Separately:
- Extract the firmware and locate the modem.img file.
- Use SP Flash Tool to flash only the modem file.
5. Fix Stuck on Logo
If the device is still stuck on the logo:
- Enter Recovery Mode:
- Power off the device.
- Press and hold Power + Volume Down to enter Recovery Mode.
- Wipe Data/Factory Reset:
- Use the volume keys to navigate and the power button to select.
- Choose Wipe Data/Factory Reset and confirm.
- Reboot the Device:
- Select Reboot System Now.
6. If the Device is Still Dead
- Check Battery: Ensure the battery is charged or replace it.
- Test with Another PC: Sometimes USB ports or drivers on the PC can cause issues.
- Visit a Service Center: If all else fails, take the device to an OPPO service center for professional repair.
Important Notes
- Always back up your data before flashing firmware.
- Use the correct firmware for your device model and region.
- Ensure your PC has a stable power supply during the flashing process.
Let me know if you need further assistance!