Share your experience!
does the jack go all the way in the plug?
did you fiddle with the 'smart connect' settings?
my guess is that:
the phone fails to detect that you have stuck something in it, for electronic reasons
how familiar are you with electronics?
edit:
i have a z ultra, not a z1
the hardware is similar, but not the same.
my phone does not care what you stick in the headphones, it always tries to play through there
however, if the Z1 works different, it might explain what is happening to you. if you have a spare cable (from old headphones or whatever) we can try something
**bleep** it. i just realized that a 3 conductor jack isn't enough
we need a 4 conductor jack
i said four conductor jack, not rings. count the metal parts. Those are conducting... so yes, the one you pasted is right.
i am not very sure if it is going to work, though, if we can make any conclusions...