As per
@chukdefatey request.
Here is a good article I found and it brings up all the important points to look for as I once purchased a fake Note 3 which I should have noticed but being in a hurry and having dealt with this guy before made me overlook my own due diligence.
Anyways the link here.
http://www.blogtechtips.com/2014/12/02/spot-samsung-galaxy-s5-clone/The one trick I always do now is the download mode.
Phone has to be powered off to start.
With some effort hit the vol down, sleep/wake button and the home button all at the same time and keep down until you get the caution download screen.
If real you should get the option for volume up/down and I think it's vol up and you should get a second screen with all the info in the top left hand with official status, model number of phone and in middle of screen the android droid.
If you get Chinese writing it is a FAKE!
Kindly give the phone back to seller and walk away.
This is not the only thing to look for but is the most conclusive IMHO.
Good luck and watch the link as I may have missed some stuff but always be on guard.
