How to put people on three way and how to ...

For a Home Phone -Three way is easy: Just call some one or have them call you and then press the flash button and dial the new number. Then after they answer , press the flash button again and there should be 3 people on the line.
For a cell phone it's pretty much the same except instead of pressing a flash button you push send and the phone will ask if you want to have a conference call which is 3 way.

To check your voicemail dial your phone number and press *Star or #Pound (depending on the phone) this will take you to the voice mail menu. If it asks for a password and this is the 1st time your using it, dial in your phone number without the area code.