The paper entitled “The use of mobile phones through audio and voice recordings to improve English pronunciation and intonation” aimed to contribute to develop appropriately two of the speaking sub skills such as: pronunciation and intonation. The population was 25 students of the fourth level of the Dentistry School of the Universidad Nacional de Chimborazo during the academic term October 2015- February 2016. The study was quasi-experimental and the proposal was carried out as a complement for the class activities considering the syllabus of the English subject. The strategy was applied for 10 English lessons working inside and outside classroom. A pre-test, intermediate test and post-test were applied in order to obtain results of the application of the strategy. The results showed that students felt more confident working by themselves and at their own pace by the means of listening audios in English and recording them as many times as necessary with their own voices imitating pronunciation and intonation of the original audio. It was evidenced that students had a meaning progress of 25% comparing the three test mentioned above. In short, it may be said that the proposed strategy is useful and easy to be used by any teacher.