When I bought it. It was running smoothly after 6 months it started showing lags then I used many trash n cache cleaner apps then also it wont run smooth. After 1 year it started lagging so much I formatted the phone. That was the biggest mistake I made then my phn would not turned on it only showed start up screen. Then I took it too service centre they told me it would cost same price to repair it for I bought it. Then I took it local repairing station they told me the same. And they said HTC is using cheap meadiatek motherboard which only work for a year.