OnePlus One was released in April 2014, and marketed as the “2014 Flagship Killer”. The device sports a 5.5″ 1080×1920 JDI display. It’s powered by a 2.5GHz Qualcomm Snapdragon 801 processor and 3GB of RAM. Storage comes in at either 16GB or 64GB. Other features include a 13MP camera, 3100mAh battery, dual front speakers and StyleSwap replaceable back covers.
OnePlus One runs on a customized version of the CyanogenMod OS. OnePlus has released its first official Android 5.0 Lollipop alpha custom build for the OnePlus One. This custom build is an early version and contains no extra features beyond the stock taste of AOSP (Android Open Source Project) Lollipop. The final version will be released shortly but before that you can try out the alpha build.