For those who do not understand how the mobile phone companies make their money. When you ring and you hear the called phone ringing. That phone is connected - this means you pay for the CONNECTION FEE. So they will charge you for connecting you - even if the called party does not answer.
Al missed calls are charged.
+ all calls going to voice mail are charged.
+ if you are retrieving voicemail messages, you are also being charged.
So make sure those people you are calling have thier phones on otherwise you will all loose.