OnePlus One

The OnePlus One (colloquially abbreviated to OPO and also known as OnePlus 1) is an Android smartphone manufactured by OnePlus. Unveiled in April 2014, it is the first product by OnePlus. The OnePlus One was designed to compare favorably – in performance, quality, and price – to flagship devices by leading smartphone manufacturers. It was also intended to be developer friendly, and has since received a wide variety of ROMs and custom kernels from the community. The OnePlus One shipped to most markets with the Cyanogen OS operating system pre-installed, a commercial variant of CyanogenMod. The phone was first made available for sale on 25 April 2014, exclusively from the OnePlus website, but initially required prospective customers to obtain an invitation before they could purchase it. These invitations were primarily distributed by the company through contests, some of which attracted attention for their unconventional or controversial nature. On 6 June 2014, the device was available for general sale. As of 20 April 2015, the device no longer required an invite to purchase.