The main purpose of this project is to improve the positioning behaviour of the Android smartphones, using them as station of Global Navigation Satellite System (GNSS). Focusing on the main errors that occurs by different factors and affect on the phone location and applying solutions, to achieve the understanding of the behaviour of the devices under different situations. For the Rinex data collection the app Geo++ Rinex Logger has been the main support, different Android smartphones has been checked during the process and, furthermore, an u-blox device is involved in this project. The collected data, is processed with RTKLib software, which allow to perform a post-processing and a real time study.