Official Skype app finally released on the Android Market a few short days ago. It lacked the ability to make 3G calls on certain carriers within the US. A forum poster hacked Skype’s official app to make calls over 3G for Android users. You can download the unlocked version of the application from DroidForums.net (.apk file) You can also download the unofficially released version of Skype from the DroidForumnet.net (http://www.droidForum.net)”]
Source: https://www.csoonline.com/article/2126035/android-hack-enables-3g-skype-calls.html