I have an iPhone 6 64 GB that I bought new when the phone launched. Recently I've been experiencing the small lightning bolt icon next to the battery in the top right corner sporadically disappearing and reappearing, but almost exclusively with a specific car charger cable I've been using. Here is the cable http://www.bestbuy.com/site/griffi...lack/7087148.p?id=1218829007388&skuId=708714 The cable now also becomes disconnected on its own repeatedly and I have to be careful for it to stay inserted. It seems that either the input/docking port is loose or damaged/dirty somehow or the cable itself is damaged. What exactly do you think caused this, and how can I best fix it? Will the Apple Store be able to repair it without replacing my phone? Thanks.