Those 3 have great build quality for the asking price.
Don't forget the self cracking screen issue in Xperia Z series, the infamous bendgate of iphones and as usual terrible plastic bodies and same boring design of almost all samsung phones.
No. You seem to have zero sense about build quality.
It's better to spend 20 rupees for something worthy than 5 rupees for nothing.
iPhone first generation and the last look almost same. LG G3 and G4 look same, same goes for HTC M series, and Sony Xperia series. Where Samsung is the one which changed everything fundamentally, by going to glass/ metal from plastic (I prefer the latter anyway) from S5 to S6 and Note 3 to Note 4!
Check your facts next time.
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You people keep saying about the self cracking issue as if it happens to every other phone while in reality its a really really rare deal
My Z is a year old now and I haven't faced any such issues with it
And also if you are talking about self cracking then even Optimus G and Nexus 4 had that problem
Very minor percentage of users have that problem, doesn't count. If Sony sleeps still they will come up with better products than LG and kinds. Xiaomi, OnePlus doesn't even belong in the same league, never will.