Bests & Worsts Reviews from Amazon

I don't usually post reviews, but I feel the need to review this one. This is my experience with Samsung Galaxy S6 When I received the phone it looked like it was new and factory sealed,however I notices residue from an old sticker on the bottom,which was my 1st clue that the phone was not new. However plugged it in for charging in the morning and left it.It took the phone more than 4.5 hours of charging to go to 74% battery, than I had to go to work so I unplugged it (I don't like to leave plugged items when I am not in the house) and left it on the table. Came back approximately 7.5-8 hours later.Without being used but at all, just by sitting on my table for a few hours battery was already at 30%,So I am thinking this cannot be right! Asked a friend who is more knowledgeable than me and he said probably your screen is too bright and you have too many apps working which makes the battery die fast.However how can a bright screen be a problem when the phone is not being used at all. Still left it to charge overnight, the next morning I put on my screen protector and took it work. Notices right away I am sending a few messages, updating my phone book,battery is literally dying for minutes in front of my eyes just by using the phone for text messaging. Still thinking this is not normal for completely new phone,but hey all these new "big screen, lots of apps" phones are doing that probably. Went to work, within a few hours battery from charging all night went to 12%,I am used of bringing my charger with me as my current phone is very old and it does not last long,so I plugged it in,for the 2nd time before the end of that day,the phone did not even register the charger! I tried it on another phone and the charger worked perfectly! When back home and tried the charger again,just in case, again phone not registering the charger and the charger worked on my olf phone,. That was my :Ok,that's enough! Just sent the phone back a few minutes ago and I am expecting full refund. I read other reviews for this phone with the same problem.But I also have a couple of friends using Galaxy S6 that they purchased from a cell phone service provider and they don't seem to have issues. So I am not sure if this particular model has these issues or the 3rd party sellers on Amazon are selling old and refurbished phones for new ones! So whichever it is, be on the look out! Phone is not that cheap so these troubles would be normal and not frustrating! Not to mention that I lost $15 for screen protector that I used and I am not going to be able to use anymore and order a case also that I have to cover the shipping for returning! So all and all not a good experience!