I bought a iphone 5s in December 2013, from the first day, the iphone resets itself using any application. The reset took about 5 seconds, and after that worked fine. There were days that ocurred between 20 and 25 times, and others no more than 1 or 2 times.
After installing iOS 7.0.6, the resetting has become the touchscreen sometimes doesn't work.The iphone only responds when you touch physical buttons (home, power or volume), touchscreen is dead. This happens until you reset it, or you press the power button to go to lock screen. Once done, it works fine until the next freeze.Now, is restored to the iOs 7.1 (official version without any backup of my data) and still doesn't work, reproducing sometimes the same frozen. I sent to repair the iphone to AppleCare with videos inside demonstrating the problem, but they returned me, the iphone is right for them. AppleCare doesn't help me, and I have a phone that doesn't work. The phone is 3 months old, and cost me 699€ (europe price) .I need a solution from Apple, what can i do?