Making free internet-based call using your Android phone

It's not a secret that you can make free calls using your Android phone and Google Voice, even without a SIM card in your phone. This is NOT a step-by-step guide, but instead a general description of how it works. Warning: setting this up is not a trivial process. You will need to fill in all the details for yourself. Google (Yahoo/Bing/your search engine of choice) will be your best friend.

DISCLAIMER: The information provided below comes with no guarentee of any sorts. Absolutely nothing. I do not encourage, endorse, or recommend the actions suggested below. Do them at your own risk, and don't blame me even if your phone stops working, your house burned, you lose your boyfriend/girlfriend, your candidate of choise loses the election, or the doomsday comes.

What you need

Let's first go over what you need:

• Google Voice Callback app
  
• A Google Voice account
  
• Internet connection for setup as well as every time you make a call
  
• A VOIP account that works with the SIP protocol
  
• A real phone number (DID) that can transfer call to your SIP account
  
• A SIP app for Android