I had purchased this mobile in may.And before buying I had many questions because that time two mobile where at competetion one is this mobile and another was xiaomi mi4.Both were having same specification but the difference was in battery life.Because xiaomi mi4 was having 20 mah less battery than the oneplus one.I had seen many reviews and after a month or so I had decided to buy oneplus one because of more battery life and bigger screen size.And its been approximately around 8 months and now also this phone works like a new phone.No problems what so ever.I thought of upgrading to one plus 2 but its battery life was less compared to oneplus one.so I skipped my decision.so dont worry that oneplus is not better because it has become old but it is not like that.Now also its a flagship killer in all aspects.so you can buy it eyes closed.