Taxicabs of the United States area. The president of United Cab discourages his drivers from carrying firearms, instead advising them to accelerate the car and crash into a lamppost or even a police car if they are threatened with a gun. Uber is a major competitor to taxi companies, providing on-demand for-hire car service through a smartphone app in many US cities. Uber services are generally treated as black-car services from a legal standpoint and are not generally regulated under Taxi laws. This can cause friction with both local governments and taxi companies. In June 2015, the city council voted unanimously to increase taxi fares;
Smartphone image file formats. With the rise in number of mobile medical apps in the market place, government regulatory agencies raised concerns on the safety of the use of such applications. These concerns were transformed into regulation initiatives worldwide with the aim of safeguarding users from untrusted medical advice. Smartphone malware is easily distributed through an insecure app store. Often, malware is hidden in pirated versions of legitimate apps, which are then distributed through third-party app stores. Malware risk also comes from what is known as an "update attack", where a legitimate application is later changed to include a malware component,