[3] As laws regulating online gambling were passed, it became necessary to use technology to prove the physical location of players.
[4][5] When the first hand of licensed and regulated online poker in the United States was dealt in Nevada on April 30, 2013 by UltimatePoker.com, the site relied on a combination of a player's IP address and GPS signal from their cellular phone.
Many players experienced problems from this process that made it difficult or even impossible for them to be correctly geolocated in Nevada and prevented them from playing.
[7] Players reported fewer difficulties and even those located close to New Jersey's border could still correctly pass the geolocation check.
This presents the unique challenge of disallowing play in certain physical locations within a state in which online gambling is otherwise authorized.