Jsou totiz dva standardy zapojeni (netyka se to jen Nokie) a to OMTP a CTIA/AHJ (American Headset Jack)
Uz u N9/N900 vesrsus Lumia 800 z toho bylo pozdvizeni, jen kratka citace jednoho z tehdejších uzivatelu..
"This is the standard 3.5mm TRRS (Tip, Ring, Ring, Sleeve) connector used on all phones. The one on the right is the in-ear one from the N900/N9. And the one on the left is the WH-902 from the Lumia 800. The Left, Right, Mic & Ground convention is used by 90% of phone manufacturers. So why would Nokia change the sequence of the signals?
The blame lies in a certain fruit company, who decided that adhering to a signal standard used by all phone manufacturers is too mainstream. So they thought differently and came up with a different solution, which meant their devices were incompatible with all existing headsets and had to use their own headset or an adapter which inverts the signals. The American Headset Jack (AHJ) it’s now called. Magical, isn’t it.
& now Nokia (or Microsoft) have decided to copy this break from the industry standard, rendering all previous Nokia headsets useless without an adapter. & they aren’t the only ones – the Galaxy S2 also uses this AHJ connector."



