Hi guys, I have an iPhone 6. I just happened to put my iPhone next to my ear last night and noticed some hissing coming from the speakers. I turned the phone off and on and it disappeared. However, when I play a video, be it on Youtube, Safari, Facebook etc, the hissing is back. If I pause the video or the video finishes, for almost 10 seconds afterwards the hissing starts and then it stops. It's faint but it's noticeable. Almost like the video is still playing. Is this an issue that I need to resolve? Or is it normal? Edit: It is after any sound, unlocking the phone, locking the phone, there is a small hiss from the speakers.