((hot)) - Ruu-shooter-u-ics-35-s-htc-asia-tw-3.28.709.3-radio-11.77.3504.00u-11.25.3504.06-m-release-270747-signed.exe

Install the latest HTC USB Drivers or HTC Sync so your PC can recognize the phone in Fastboot mode.

This happens if you try to flash an RUU from the wrong region (e.g., trying to flash the Taiwan RUU on a European device). You may need to change your CID to HTC__621 or have S-OFF (Security Off) status to bypass this. Install the latest HTC USB Drivers or HTC

The utility will verify your current software version and device ID (CID). If compatible, click "Update" and wait for the progress bar to finish. Do not disconnect the cable during this process. Common Troubleshooting The utility will verify your current software version

Connect your phone to your PC via a high-quality USB cable. Common Troubleshooting Connect your phone to your PC

Ensure the phone is in Fastboot mode and drivers are correctly installed. Try a different USB port.

This often indicates the bootloader is unlocked. Use the command fastboot oem lock in the ADB terminal to relock it before trying again.

An RUU (ROM Upgrade Utility) is a Windows-based executable used to flash official firmware to HTC devices. It is a critical tool for: