Hey everyone! I just got my iPhone 6S Plus 2 days ago, and when I just plugged it in to charge and as soon as I did, my screen flashed 3 times and the charging sound glitched out and lagged (kind of choppy sounding). Is there any reason for this or is it nothing to worry about? I only ask because I had so many defective issues with my 5S last year, that I'm kind of freaking out about what just happened. Thanks in advance!