Connect the phone to your PC via USB (Fastboot mode is often required; hold Power + Volume Down to enter the bootloader).
The radio (baseband) firmware version:
This is the exact software build/version number. In HTC's numbering scheme, .709 is the specific regional carrier ID for Taiwan. The final .3 marks the minor revision number of this public software release.
Restoring a soft-bricked, boot-looping, or stuck-at-logo HTC EVO 3D. Connect the phone to your PC via USB
4.0.3 – 4.0.4 (Ice Cream Sandwich, API 15)
The utility will automatically verify the connection, check your device’s current software signature, and begin the process.
The exact software build number. The digits 709 represent the specific Taiwanese Customer ID (CID). The final
HTC utilizes a strict nomenclature for its official Windows-executable ( .exe ) flashing packages. Breaking down this file string reveals exactly what hardware and software configurations it contains:
3.6
In an era of seamless Pixel updates and Project Treble, the RUU format feels archaic. Yet, for collectors, repair shops, and Android historians, 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 is a time capsule. The exact software build number
Android 4.0.3 (Ice Cream Sandwich) with Sense 3.6.
If your phone is currently rooted or has an unlocked bootloader, you must relock it before the RUU will run successfully: Relock Bootloader
(Android 4.0.x). This tells us the RUU predates Jelly Bean (4.1/4.2) or KitKat (4.4). HTC Sense 4+ was the likely UI overlay for this build.
To Android enthusiasts and developers, an HTC RUU filename is an information-dense string of technical specifications. Here is exactly what each segment of this filename signifies: