Make free Skype -to-Skype calls, and call phones at Skype rates on the move. Free Skype-to-Skype IM and calls over 3G or WiFi. Cheap calls to landlines or mobile phones at great Skype rates. Instant message one or many friends at the same time. Data plan or WiFi connection required. Some handsets may not be supported. You need Android v2. 2 to run Skype on a Samsung Galaxy S.