are those second hand smart phone, or they are new? and where it will be located?, the problem with goods from usa is that for us european there are trouble with the customs
They are new.
They are just 1:1 clones of the originals.
Yeah, the Chinese are good at this

How long will these last? My friend got one of those fake Samsung S3 (or something like that, the costly one) and the touchscreen broke in a few days and it stopped receiving calls a few days after that.