As the Global Position System (GPS) based technology increasingly implemented into the civil applications UAVs, it has been driven by the mass-market that more precise and reliable GPS services are demanded. However, due to the weakness of the GPS signals, the GPS receiver performance could be easily disrupted by anthropogenic disturbances, among which the jamming and spoofing activities are extremely crucial threats. In this paper an preliminary investigation on the effects of the jamming and spoofing disturbances to the mass-market positioning and navigation units integrated in the smartphones and drones is provided. Comparative analysis will be addressed on the performance of drones under the intentional disturbances.