HTC implemented robust security layers to prevent unauthorized flashing, leading to a "cat and mouse" game between HTC and the modding community.
It is the digital defibrillator for a dying HTC; the undo button for a bad flash; the time machine back to stock Sense UI. If you own an HTC Desire, EVO, One, or Butterfly, downloading the correct RUU and learning to use it is a rite of passage. htc android phone rom update utility
| Type | Description | Availability | |------|-------------|---------------| | | Signed by HTC, requires locked bootloader | HTC Support site (rarely public) | | Leaked RUU | Unofficial pre-release builds | XDA Developers forums | | Decrypted RUU | Modified to allow downgrades | Third-party tools (e.g., RUU Decrypt Tool) | RUU Decrypt Tool) |