There are two primary methods to update to the stock ROM, depending on your device's current state. Method 1: Using the .exe RUU File (Easiest)
Ensure your M8 has at least 60% battery life to prevent it from shutting down mid-process.
Download a trusted, untouched stock ROM zip file matching your software version.
The HTC One M8 had various regional and carrier variants (GSM, Verizon, Sprint, International). You must download firmware matching your specific model number.
There are two primary methods to install an updated stock ROM on the HTC One M8: using an executable file (RUU) or flashing a zip file via the bootloader. Method 1: Using the HTC ROM Update Utility (RUU .exe) htc one m8 stock rom updated
This occurs if you attempt to flash a stock ROM zip meant for a different carrier model. Double-check your device CID in bootloader mode.
HTC对One M8的官方更新虽已停止，但社区开发者的热情并未消散。以下是为M8开发的活跃第三方ROM方案：
This is the most popular choice for keeping the M8 current. As of 2026, there are builds of LineageOS 21.0 , which is based on Android 14 Performance:
RUU is the ultimate tool to unbrick a bootlooping or malfunctioning HTC One M8 There are two primary methods to update to
Open a command prompt window inside your computer's ADB/Fastboot folder and type: fastboot getvar all
Because official support ended years ago, many users move to custom ROMs to keep the hardware modern:
Because official official over-the-air (OTA) updates stopped at Android 6.0, independent developers stepped in to create "custom stock" ROMs. These are built directly from HTC’s official software but are optimized, de-bloated, and updated with stability tweaks.
If your device is stuck in a boot loop or you have previously modified it with custom software, you may need to use an RUU. This tool completely overwrites your current software with a fresh factory image. HTC One M8 Flashing a RUU of TWRP Recovery in Hboot The HTC One M8 had various regional and
The final official Android OS update provided by HTC for the HTC One M8 is .
Right-click the downloaded RUU executable file on your PC and select .
HTC One M8 , widely regarded as one of the most iconic smartphones in Android history, reached its official software peak with Android 6.0 Marshmallow
：