surprisingly the most common fault actually seems to be the power cord. At least, that has been my experience. I have had a phone charging in my car with an incessant "bing,bing,bing" noise it makes when the cable hooks up. Bad port, right? Nope. Brought it in the house and plugged it into a newer cable and wiggled it. NO annoying reconnect noise. So. I need a new cord for my car. One little headache solved. For now. The phone and the kindles share the same port by the way. It's and Alcatel.
nuff' for now
bill