If you plan to mods this phone, you can consider to download the HTC One A9 RUU. The RUU is a stock firmware for HTC devices that useful to upgrade or restore the phone back to stock condition. The RUU includes lots of software needed by A9 to work, such as the Android OS and its apps, bootloader, radio, kernel, etc.
Just like other HTC flagship device, the HTC One A9 could be a developer friendly device, meaning that we have the opportunity to mods the phone, start from gaining root access to installing custom ROM. But not all variants have the same opportunities, since some A9 variants come with locked bootloader, especially carrier-branded devices such as AT&T, T-Mobile, Verizon and Sprint.
HTC One A9 introduced in September 2015, it’s the successor of previous HTC Android flagship smartphone – M9. This new HTC phone also has a full metal body, but the design is a little bit different from the previous model, many even said that the device is more similar to the Apple iPhone 6. Regardless of the design that is similar to other brands, but this phone has been equipped with the new Android 6.0 Marshmallow which is the latest Android version.
HTC One A9 users are quite lucky because until today there is no other device being sold with Marshmallow out of the box, even the new Motorola Droid Turbo 2 and Droid Maxx 2 for Verizon that released a few days ago shipped with Android 5.1.1 Lollipop, although it will be promised upgrades to Android 6.0 sometime in the future.
Here are some of the HTC One A9 RUU download links for several variants. However, not every A9 variant has RUU available, especially carrier locked phones.
HTC One A9 RUU
Commonly, RUU is also available in Windows executable files (.exe) or zip files, both use a different way of installation. The RUU for HTC One A9 US variants (AT&T, Sprint, Verizon, T-Mobile US) is not available yet, we will update it when it available.