Now you can make free Skype to Skype calls and IM over 3G or WiFi with this free Skype app. You can also make cheap calls to landlines or mobile phones at great Skype rates. You can also instant message one or as many friends at the same time which is good. For all that you need Data plan or WiFi connection this is the only reason some handsets may not be supported.
I suggest you need Android v2.2 to run Skype on a
Samsung Galaxy S