In this Youtube video you can see how they are hammering the phone to prove that their newest model Oukitel K6000 is tough and apparently a rock-hard forehead. It has the latest Asahi Dragontrail glass which is obviously strong. They wanted to prove that the K6000 is almost resistant like any other rugged phone.
From what we can see there is no visible damage to the phone, the touchscreen works as it should work. So I can freely say that the Oukitel K6000 successfully passed hammer challenge. It is also interesting that this phone has 6,000mAh battery.