[skopel]

I've been trying to work out this question for awhile, can't figure out where to start. Hope you can help

How to connect two sets of bluetooth headphones with the same phone at the same time.
It seems to me that it requires os level changes. Do you agree? or can it be done with an app?

It seems like an obvious improvement, useful for two people running together, or on a plane together. I wonder why no one has made this happen yet?

[Rukbat]

Because the market is much too small. (On an airplane, two wired headsets is trivial.)