The s4 costs almost $250 to manufacture, if they sell it to carriers for $650 that is 160% profit margin for Samsung. (it is actually less than that for Verizon, AT&T, T Mobile get a discount for buying in bulk).
If the nexus 4 costs $200 to make, if they sell it for $300 that is a mere 50% profit margin.
Not really true.I have a friend that works for tmobile and says they get paid 35% commission on the full price of the phone they sell. So I'm assuming the carriers get the phone at about 50 % discount.and their profit is the remaining 15 %.