Телефон Ростелеком is a convenient and functional software SIP phone designed exclusively for users of the "Virtual PBX" service offered by PJSC Rostelecom. This Android application allows users to make and receive calls within the company's short numbers, as well as to the public switched telephone network and SIP numbers. It supports features such as mute, speakerphone mode, touchtone commands, and different ringtones.

In addition to its telephony capabilities, Телефон Ростелеком also offers a functional address book that includes the company's employee directory, a general address book for customers and partners, and a personal address book for the user. The application supports video calls and provides a call log for easy reference. Users can also check the presence status of their colleagues and receive LED notifications for voicemail messages.