Text Data Embedded into a Voice Call

This publication describes systems and techniques directed to embedding text data into a voice call. A first wireless-communication device, such as a smartphone, includes a text-voice manager application. The first wireless-communication device performs the voice call with a second wireless-communication device that includes a peer text-voice manager application. The first wireless-communication device, by executing instructions of the text-voice manager application, performs operations that include receiving text data for a text message, converting the text data to a voice message, detecting silent periods in a stream of a voice transmission, and embedding the voice message into the detected silent periods in the stream of the voice transmission. The second wireless-communication device receives the stream of the voice transmission, detects a pattern in the stream of the voice transmission that indicates a presence of the voice message, de-converts the voice message to the text data, and embeds the text data into a text message displayed on the second wireless-communication device