Things You'll Need
Instructions
Download the SvSIP software from the SvSIP website and save it to your PC. The SvSIP software is the software that enables your Nintendo DS to act like a phone. The SvSIP software currently allows you to call a number and to receive calls.
Create a VoIP account and remember your username, password and domain name of your service provider.
Unzip the SvSIP software that you downloaded and insert the "SvSIP.nds" file onto the root directory of your MicroSD card. Then in your MicroSD card, create a new folder and name it "SvSIP" and place the "Numpad.png" and "Config.txt" files in the folder.
Open the "Config.txt" file and insert your username, password and domain name in the spaces provided. It allows your Nintendo DS to connect to your VoIP provider.
Now load your MicroSD card into the R4's flash card. When you have finished it into the flash card, insert it into the Nintendo DS, turn it on, run the "SvSIP.nds" file and dial any phone number you want.