Final answer:
Obscene phone calls in the state of Nevada are considered a crime, regulated under the state's laws to safeguard privacy and public decency.
Step-by-step explanation:
In general, obscene phone calls in the state of Nevada are classified as a crime under the state's obscenity laws. These laws are part of the measures that states can use to regulate sexual morality and protect the privacy of communications. Although the Supreme Court has allowed considerable leeway in what adults can do in private, states still have the right to regulate material that they deem obscene and can place restrictions on such communications which are deemed detrimental to societal standards. In the state of Nevada, making an obscene phone call may violate laws intended to safeguard individuals' privacy and maintain public decency.