Telesis SipPhone is an Android application for VoIP telephony with using the industry-standard SIP (Session Initiation Protocol). SIP calls can be established in both mobile and WiFi network. Telesis SipPhone supports dual accounts and services for both incoming and outgoing calls. Telesis SipPhone is specifically developed to utilize advanced SIP telephony features. Among these are; call transfer, call hold, and call wait. With Telesis SipPhone, you are accompanied with your office telephone even if you are out of the office.