There are many Android Apps allowing to convert your Smartphone or smart devices into an internet phone, which provides various features such as video calling, shearing pictures, and texting without or inexpensive charges. All the data can be sent or received via Wi-Fi or 3G/4G. If the data transfers using 3G/4G networks, there is a fee for the data usage depending on your service plan with your phone service providers.
We selected three popular Internet Phone (mVOIP) Apps – KakaoTlak, Talkatone, and Skype, and reviewed from this article.