Bare in mind that the LongoMatch Mobile uses the Wi-Fi connection to find the nearby devices. So, in order to find the software application, both devices (computer and mobile) must be connected to the same network. So, if your computer is connected to the Wi-Fi but the mobile is using the mobile data, LongoMatch Mobile will not be able to find your computer. So, please, connect the computer and the mobile to the same Wi-Fi network.