A great feature present in most Android devices is the fact that you have the ability of using them to make free phone calls either over 3G or WiFi. While the good people at Google had the consumer in mind when they developed the built in capabilities on Android, the carriers thought that it was not in their best interest to allow such a thing to be available. So, the Samsung Galaxy S 2 was stripped from its right to make and receive free phone calls. The stock SIP stack, which is the one responsible for VOIP did not come integrated in Samsung’s latest flagship. However, thanks to a guide written by XDA member mobilegalaxy there is now a fairly simple way to get the stock app back in your device. Having this will allow you to make and receive free calls over WiFi and 3G.
The guide is fairly easy to follow. However, please read it over before you start to avoid mistakes.
As most of you have probably already figured out by now the Samsung Galaxy S II, despite running Android 2.3.3, doesn’t have the native Android SIP Stack integrated.
Normally, all smartphones running Android 2.3.3 or higher come with a native SIP stack, allowing handset owners to register their SIP accounts to make and receive calls through VoIP.
You can find more information in the original thread.
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