Is it possible to make my phone as a remote shutter? Is it possible to set a android phone to act as a remote shutter that can connect multiple devices (phones and/or camera) via bluetooth to take photos?
These types of remote shutters usually rely on a more standard 3.5mm jack to plug into the camera. The only Bluetooth solution I know of is this:

http://www.amazon.com/Satechi-Bluetooth-Wireless-EOS-D2000-Compatible/dp/B00ANWQMWK

but unfortunately it looks like its only for Canon DSLRs with a hotshoe.