Considering these are quite heavy, do these headphones slide down when tilting your head backwards or lying down in bed?

Very good, although it has a bit more background noise due to being farther away from your mouth and not having noise-cancellation like the mic in most phones.

Samsung Galaxy S5: volume Samsung Nexus S: prev/next The Ebay description says that the Samsung Galaxy S3, S4, Note 2 and Note 3 act as volume buttons.   Seems like the newer Samsung devices use those buttons for volume. But you can always change the buttons if you have rooted your device.

Depending on your phone they could be previous/next song or volume up/down buttons, but yea they work on Android devices. I haven't tested on Apple devices.

I've been using it almost every day in my office. Although it does feel a bit cheap, it's still working fine. I actually got a Samsung Galaxy S5, and the prev/next buttons changed to volume buttons. But I was able to fix that by editing some files.   Actually the replacement cable does...

I have a Nexus S running Android 4.4.2. It's an old phone, but combined with voodoo sound to unlock the full potential of the Wolfson dac it sounds great.

Yes, twist to lock still works with this cable.

I've received the cable today and can confirm that it fits the M50x perfectly. The cable is thinner than the stock cable, but I can’t hear a difference in sound quality. All three buttons work on my Android phone, which is great since usually only the center button works on Android devices. I...

  This link also claims that their hd598 cable fits the M50x.   I've ordered this cable from Ebay. Hopefully it'll fit, I'll report back when I receive it. Might take a while to make it here though.