Although I briefly mentioned this issue in another post, I did not focus on the problem of the power button getting very hard to push. For the longest while, I did not have to push the button with any great force, but that is not the case now. I have to push it quite hard or even push it twice in order for the phone to turn on. Also, I find that pushing the center of the button does not do the trick. Often, I have to push on the right or left side. Has anyone experienced the same problem? I welcome advice regarding this issue.
boss.king, thank you for the reply. Over a number of days, I angled my finger quite a few ways, but I continued to experience the problem. I imagine, however, that the issue was indeed due to user error. I jumped to the conclusion that the phone was at fault rather than the user. I hope I did not cause others, in this regard, to question the quality of the product.