OnePlus One is the killer device introduces by the same company who makes the awesome CyanogenMod and this phone comes directly out-of-the-box with cyanogenMod 11S(4.4 KitKat).
Even thought the device is priced at well under $300 its compared with all the flagship devices by most of the other manufactures, such as Google LG Nexus 5, Samsung Note 3, Samsung Galaxy S5, etc.
Even the OnePlus One Official website is promising this is gonna be a Flagship killer and this is a direct challenge for those manufactures to make their next flagship phone to be cheap and packed with Android features while not destroying the Awesomeness of Android.
The One has a 5.5 inch FHD screen, placing it on the larger end of smartphone screens. Because its screen is 5 inches or larger, this phone also qualifies as a phablet. This also means that for most users, the phone will be difficult to use with one hand vs phones with smaller screens.
The screen has a resolution of 1,920 pixels by 1,080 pixels, making it a 1080p screen HD screen. Display sharpness can be measured in pixels per inch (PPI), and at 401 pixels-per-inch of screen, it’s 72% sharper than an average screen.
In the US, it’s carried by AT&T Wireless and T-Mobile.With 4G LTE support, it supports the fastest connectivity band currently available on smartphones.