There are four things in Apple EarPod
- Speakers
- Microphone
- Play/Pause Button
- Volume Up/Down Buttons
##for speaker and microphone
Apple EarPod supports Universal Head-Phone config.
Should work with: HTC, Samsung, LG, Most low-brand phones, some Motorola and some Sony, Audio Players.
Microphone and even speaker will work sometimes, but not well, with: Nokia, Most Sony, Most Motorola.
##for play/pause button
This works for most headsets.
##for Volume Up/Down buttons
This is very, very specific and you'll have to do some research on sites like pinouts.ru. People on the Apple store say volume button works well with HTC Wildfire, but I'm not sure.