Would you only buy a Galaxy or iPhone?

So the other day, I was chatting with my friend about new smartphones. He currently owns the Galaxy S5 and was thinking about either upgrading to the Galaxy S6 or the iPhone. I jokingly informed him that there are other Android smartphone manufacturers such as HTC, LG, Motorola, etc. However he told me, “Dave, honestly, unless it’s a Galaxy or iPhone, I wouldn’t consider buying it.” Of course, at first I assumed his comment came from pure ignorance of the smartphone world. But then, I started to ponder. I wondered how many other people only stick with the devices from either Apple and Samsung and why?

Dave, honestly, unless it’s a galaxy or iPhone, I wouldn’t consider buying it

Of course, this could all be the result of very good marketing. In any case, would you only stick with the Galaxy or iPhone?