If you are a HTC One M7 user, you are in for a treat. You can now update your device to the latest Android 5.0 Lollipop. However, the OS is not officially rolled out by HTC as it was developed by senior developer at XDA.
In detail, the developer created the Liquid Smooth ROM and it contains the Android 5.0 Lollipop, designed specifically for the One M7. The LS ROM is currently in its stable build and it can run without any issues on any One M7 smartphone.
The only problem with the LS ROM is that you will need to install the Lollipop on your One M7 manually. The task is not difficult but only tedious to perform. Just head over to XDA and download the LS ROM. There, you will also find the installation instruction for the LS ROM.