Oneplus one ( opo) is the first phone lf the oneplus and this phone effect the market of the mobile industry because of the specs that avilable at low cost which are avilable around 30-40k mobile phone and onrplus is providing same feature in under 24k. The specs of the phone is pretty amazing and very good, the phone comes with 5.5 inch display which is big enough and also come with the cynogen mode although in india it was avialable with oxyegen os.
The camera of the phone is 13mp primary and 5mp secondary which are pretty good at this price. The main thing that I saw in any phone is processor and the processor of oneplus one is 801 snapdragon which is pretty good at this price.
The best thing about this phone is that you can root this phone when ever you want and their is no loss of any warranty in that. You can also change the rom of phone by simply installing it from the recovery mode.
Their is lost of things that you can do with this and I would recommend you to buy this.