POTENTIAL SOLUTION HERE:
I had the same issue. I realised 2 days after purchase. The backspace button failed to react sometimes. On occasion would fail for a few minutes, then work again for hours only to eventually fail again. Since I had my old phone with me, I used it to record the error. I would click many times, and since the backspace button turns white when actually deleting a space, it was easy to track on the video when it failed. I went to an Apple store and even though they would give me a new phone straight away because I had it for less than 2 weeks, a senior technician told me that that was a hardware error where some sensors in the screen failed to work properly. Seeing in this forum that many people realised the issue well passed the 2 weeks return period, I asked him what could be done in that situation. The senior technician told me that they would anyway give me a new phone, or they may choose to change the screen, which would also solve the issue. In the store I was in, there were 60 technicians and only 4 are senior technicians, so I guess I got lucky to get that guy. He was obviously very knowledgeable. He also told me that this is a normal issue that can happen with screens, and needs to be physically repaired. It is not a software issue. Well, hope this helps, guys, cheers!
