Student voice is recently attracting educational researchers' attention for its influence on various aspects of student lives and futures, as well as social life in general. Mobile technologies are proliferating in social and practical life. This article studies student voice in carrying out outdoor activities with mobile phones. Thirty middle school students participated in outdoor activities related to real life phenomena with the mobile phone. The research results indicate that the teacher's decisions and intentions to utilize the mobile technologies in the learning of mathematics outdoors set the stage for student voice in the mobile context. Furthermore, teacher support, the availability of the mobile phone and the outdoor activities facilitated student voice through enabling various students' actions and interactions: Freedom, autonomy, equality, participation, collaboration, decision making, sharing of ideas and taking the responsibility of the teacher. The consequences of students' learning in the outdoor mobile context included affective as well as social consequences.