Galaxy s2 bluetooth stopped working suddenly
Well, that's weird first of all make sure that the other bluetooth devices you are searching using the S2 are visible, otherwise its not going to detect the bluetooth device. And if you are sure that the bluetooth devices you are trying to connect is visible try clearing the cache and the data stored by the bluetooth app, you can do that by going to settings>application manager>Tap the bluetooth app and clear the cache and the data store. Now try connecting with the other bluetooth devices and see if that works out or not.