Cars and cell phones are heavily dependent on the government(s). Cars run better when you have roads. Cell phones require laws about the radio spectrum.
Also, the fundamental research about cell phones was done by the governments. The early car business was made possible partly by government procurement of expensive cars.
so karl benz got help from the government to invent the car?
If you mean the government passed laws to help AT&T and restrict competition then yes they did.
Also yes of course car's work better with road's the question is do you trust government to spend your money or do you trust yourself to spend your money, if you got to decide what road's you used and only paid for those road's you used it would fit the need's of the public rather then the politician's and road contractor's.