: Use a high-quality or original Sony USB cable for a stable connection. Step-by-Step Guide to Remove Sony C6802 Lock
Reinstall drivers or try a different USB port/cable.
Several reliable websites offer Sony Xperia C6802 FTF firmwares:
Wait a few moments for Flashtool to finish preparing the files. A pop-up prompt will appear instructing you to connect your phone. Ensure your . Press and hold the Volume Down button on your device.
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Use an original or high-quality OEM micro-USB cable to prevent disconnection midway.