With their permission we video recorded the interaction of their hands with the UI of the phone along with the soundtrack. Each session lasted about 40 minutes and consisted of four parts: 1. a socio-demographic questionnaire, 2. a semi-structured interview, 3. a usability test of the application including a participatory element around the design of the employed icons, and 4. a debrief interview.Before starting the questionnaire we introduced ourselves and tried to establish some common ground with the participants. The teachers assured us that the participants did not know how to read or write simple sentences in French. Hence we did not perform additional literacy tests. Since we tried to establish a setting in which the participants were encouraged to provide feedback in a confident way we deemed literacy tests counterproductive to this end. The semi-structure interview focused on their use of mobile phones and SMS in their every day lives. We asked them to show us their mobile phones and the main functions they used.