Oneplus has always surprised us with outstanding smartphone at a very good price, oneplus x is no wonder.The smartphone has great built quality with metal to the sides and glass covering both-the frobt and the back.The only main highlight of the smartphone is its build quality which no other manufacturers are offering in this price range.The phone runs on android 5.1 with possibility of receiving marshmallow in the near future.The specs are a bit old but it is still a very powerful smartphone with snapdragon 801 clocked at 2.3ghz quad core.It has an adreno 330gpu with 2gb of RAM on board.
The battery life is mediocre at best, it is rated at 2525mah capacity.Hopefully it will get better with marshmallow upgrade.
Overall a very good smartphone for its price.
Go for it.