mobile electronic devices and related methods to achieve an enhanced security level are disclosed . a security module is deeply embedded in a non - open companion chip of the mobile device , wherein the companion chip controls vital functions of the mobile device . any security technology can be provided by the security module . the security module can , in case of a security violation , disable all vital functions of the companion chip without requiring communicating to other components of the mobile device . the vital functions deployed in the companion chip comprise e . g . system power management or audio functions .