The HTC One M9 launched with a 20MP camera that left many of us excited to see the manufacturer address one of the major drawbacks to the previous two versions of its flagship, but the end results were less than impressive. Fortunately the company released an update earlier this week intended to address some of the camera's issues, and now it has uploaded a full 2GB RUU as well.
This massive file only applies to the Sprint version of the phone. It serves as a means of manually updating your device before receiving the over-the-air update or returning the handset to stock if something goes wrong.
To install the file, you will need to have the proper drivers lying around. You can get them by installing HTC Sync. After the process is complete, your device will be left running software version 1.32.651.30. You can get the ROM along with the instructions at the source link below.