Google Talk is built into Gmail and comes pre loaded on the phone, works extremely well. I made a call to Bworly when the Bionic was first coming out from my computer (which is a PC, but it works through a web browser so it's not a OS thing) and also made a phone to phone call with him later after getting mine. Otherwise, Skype works just fine as well. Fring is great, but I think it's only phone to phone.