My Note 3 regularly lost connection while charging. I noticed the plug seemed loose, and found this thread, and another where users advocated tightening the screws, and bending the pins in the USB 3 socket. Well, neither of those suggestions worked, and it seems like a lot of work to replace the USB socket on the phone hoping that the connection will be tighter. If you look straight at the micro USB connector at the end of the charging cable, it looks like a "D" lying on its flat side. Well, I bent the "D" with needle nose pliers so that the flat side curves slightly in the same direction as the arch. This secured the connection somewhat for me, I get fewer loss of connection errors now. The bonus is that it's free, and it doesn't modify the phone, just the cable. update - August 1st This didn't really work for me. It probably loses connection just as often as ever.