I bought the S5 less than two months ago through Verizon, not Amazon. One of the selling points is that the phone is water and dust resistant. The USB port comes with a little flap plug attached to the phone by a rubber or plastic pin. To charge the phone, this plug is pulled aside, then replaced after charging. In less than two months, the plug attachment broke. Calls to Verizon resulted in the following: They told me I needed to contact Samsung directly. I told them that I did not buy the phone from Samsung. They agreed to call Samsung directly while I was on hold. When they came back on, they told that Samsung said that this problem was phone damage and not manufacturer defect. The fix would be done at my cost. Verizon said that they would change me $300 if I sent the phone back to them.
I don't believe this dust cover is critical to the enjoyment of the phone, but it is discouraging to think that Samsung should sell a phone for $600 with such a manufacturer defect, and that Verizon refused to go to bat for a customer.