Ensure the flash file is compatible with your device's region. Using a file meant for a different region can lead to compatibility issues.

If the phone does not power on, use the "Dead Phone USB Flashing" option in Phoenix or Infinity BEST. Briefly press the power button when prompted by the software to trigger the connection.

: Flashing will erase all user data; ensure you have a backup before starting. Risk Awareness

| Error Message | Cause | Fix | |---------------|-------|-----| | | Phone is dead or wrong cable | Use FBUS cable via dongle, not direct USB. | | Checksum mismatch | Corrupted flash file | Re-download from a trusted source. | | PPM/CNT out of range | Wrong variant file (e.g., RM-705) | Double-check model: RM-704 only. | | Write failed at 0x00020000 | Bad flash chip | Retry with “Erase entire flash before write” option. | | Phone hangs after flash | User data conflict | Manually hard reset or reflash without “Retain data.” |

A: You can try Phoenix Service Software with a USB cable if the phone powers on and enters “Local Mode.” But for dead or severely bricked phones, the dongle is mandatory.

Incorrectly flashing your device can render it unusable (bricked). Ensure you follow instructions carefully.