You make a good point. IMHO, however, companies like Samsung and Apple for example who make those kinds of phones have unlimited funds to work with, have the equipment to work with exceedingly small BGA packages, and, most importantly, employ on the order of hundreds of designers specifically suited to this kind of high-frequency work. I would be quite surprised if there were 10 designers assigned to this. Not to mention the fact that the technology available to large companies is far, far more advanced than a small manufacturer would be able to get. Also: Most high-tech companies work with custom ICs, tailor made to the size and package required, often multi-function SoCs that house GPU, CPU and other peripherals in one small package.
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