High end devices have the best margin but this is eroded by network sale agreements quite considerably. Sim free they sell for bananas money compared to the cost to networks as you'd expect. There's no way a nexus 5 is sold at a loss considering it's price but it's closer than most to the line.
The line actually reverses at the very cheapest end of the market,
The line actually reverses at the very cheapest end of the market,