Abstract: The present invention provides a method and system for securing mobile communications with a smartphone In a preferred embodiment of the present invention a secure method for controlling the microphones of the smartphone is provided. This method avoids that the phone can be exploited as a spy-phone, recording sounds and voices while in standby. In an embodiment the smartphone is hardened since the operating system is closed and no apps can be added or upgraded once the firmware is deployed. In an embodiment of the invention GPS data are secured in order to prevent unauthorized access to them. GPS data, similarly to audio ones, can be encrypted in kernel space restricting their access only to cryptographically trusted apps.