A mixed story. I bought a Samsung S6 Edge, reasona...

A mixed story. I bought a Samsung S6 Edge, reasonably priced, rated Excellent condition. When it arrived it appeared unmarked, but there was a thin and faint smear across one corner of the screen, almost as if somebody had gently run the edge of a rubber down it. I thought nothing of it. The phone had an immediate problem with losing charge, and the suppliers responded quickly to advise me to change a setting, which appeared to work. In fact, the phone continued to lose charge without warning, but much less often. The real problem was that I realised after a couple of weeks that at each end of the smear on the screen a small crack had appeared in the glass surface, and it was now clear that the "smear" was almost certainly a hairline crack, and that this had extended through being handled. I have not dropped or crushed the handset, or done anything that would have damaged it, so the crack must have been there on arrival. I understand that I should have reported a damaged phone within 3 days of its arrival, but the damage was not evident until a couple of weeks or more after that. I explained this to Quick Mobile Fix, and gave my word that I had not damaged the handset, but they were unable to offer any other solution than paying for a repair myself. I suggested that they might buy it back at a much lower price, but they were unwilling to do that. Since then, the handset has developed an alarming flash of the screen when it is re-awakened, but this does not prevent normal use thereafter. So, whilst they provided an apparently good handset at a fair price, and responded to initial requests for help, I believe that the handset was in fact damaged either before it was despatched, or in transit; sadly, my argument has not been accepted, so I find myself in possession of a fragile device with growing cracks in the screen, and no idea how long it will last.