I have iPhone 5,black,16GB. I am having the same problem. My phone screen is clicking on top left corner and top left part of touch screen. So i went to apple authorised service center. People over there said to me that it do not affect functionality of my phone so they won't replace it. It is really annoying to me. Because I have found other problems in phone. And every time they say that due to not finding any hardware problems so they won't replace it. They think that I am doing this only for replacement. But the thing is not that, I want my phone with all issues solved. If they repair it then even I don't have any problem. But they say that the replacement is the only policy. So I am asking for replacement. So all I am all trapped with imperfect iPhone after spending 45K.😟
I bought iPhone in July,2013. I got 1 replacement after a week for call sound distortion and noise issue(Robotic Sound As Well). I am facing same problem in this piece as well. But ther service center people are not ready to accept it. I am finding issue of phone heat up(Extreme Heat Up) while using cellular data. Even it heats up randomly. But they are not ready to accept it because they didn't find it(Do they really test Phone!).
I had given my phone in service center on 14th March, 2014(For This Screen Clicking Issue). Today I went there as they reported me to take my phone back as it is not an issue. But I didn't accepted the phone if I don't get replacement.
So please some one reply to my issue, whether I should get replacement for my phone or not.(At least for screen clicking problem!)
PS:- Why am I insisting for replacement is that this issue is generated itself. I have never dropped my phone till the date. Now if problem increases after warrenty, I will have to pay 10K for replacement!