Under calling accounts on Android Phones I should be able to add a VOIP account. The K1 has the calling accounts settings section, and there are options in there, but there does not seem to be an option to add an account. Was this stripped out on the K1? I know I can use a 3rd party app, but was hoping to use the native dialer.
https://wiki.voip.ms/article/Android_Sip_Client