Why Do Casinos Block Cell Phones?

US casinos do not jam cell phone signals: operating a jammer is a federal offense, and the FCC prohibits the use, marketing, manufacture and sale of jammers. What casinos do restrict is phone use at the tables. Talking, texting or filming during a hand is usually banned by house rules, because a phone can pass information to a partner or run software that gives a player an illegal advantage, and because other players and staff do not want to be filmed. Weak reception inside a casino is usually down to the building, not a blocker.

This article, updated October 2026, explains what the law says about jamming, the rules most casinos apply, the Nevada statute that makes some phone use a crime, and how it all compares with playing live dealer games on your own phone.

Can casinos legally block cell signals?

No. Section 333 of the Communications Act prohibits willful or malicious interference with authorized radio communications, which covers cell phone jammers. In its Enforcement Advisory No. 2011-04 (9 February 2011), the FCC said “it is a violation of federal law to use devices that intentionally block, jam, or interfere with authorized radio communications”, and that operating a jammer in the US can lead to substantial fines, seizure of the equipment and criminal sanctions including imprisonment. The rule exists because jammers can also block 911 calls and public-safety radio.

So when your phone shows one bar in the middle of a casino floor, the likely causes are ordinary: large concrete and steel buildings, few windows, basements and thousands of people sharing the same cell towers. Many big resorts install their own in-building antenna systems to improve coverage, which is the opposite of blocking. If a casino did use a jammer, it would be breaking federal law.

What casinos actually restrict

The rules are house rules, so they vary by property and are enforced by the dealer, the floor supervisor or security. In practice, a dealer will usually ask you to put the phone away or step back from the table, and repeated refusals can get you asked to leave.

Reason 1: stopping cheating and collusion

The main concern is information. At a blackjack or poker table, a phone lets a player tell a partner what cards they hold, coordinate bets with someone at another seat, or receive signals from someone watching the game. At roulette or blackjack, a phone can also run software that counts cards or tries to predict where the ball will land.

In Nevada that second use is a crime. NRS 465.075 makes it unlawful to use or possess with intent to use any electronic device or software “designed, constructed, altered or programmed to obtain an advantage” at a casino game, including one that keeps track of cards, projects the outcome, or analyzes probabilities or strategy. Under NRS 465.088 a first offense is a category C felony. Card counting in your head stays legal; using a phone to do it is not. Our guide to how casinos catch cheaters explains how this fits into wider game protection.

A phone on the table is therefore a problem even when the player has done nothing wrong. Supervisors cannot see what is on the screen, so the simplest rule is no phones in play.

The same logic explains why smartwatches, earpieces and hidden cameras draw attention. Any device that can receive or send information during a hand raises the same question for the pit, and the answer is usually the same: put it away while you play.

Reason 2: privacy for players and staff

Many people at a casino table would rather not appear in someone else’s video. Players may be on vacation, on a work trip or simply private about gambling. Dealers and supervisors also object to being filmed while they work, especially by an upset player after a losing hand. Most casinos limit photography near the tables for that reason, and some ban it entirely in the pit.

Reason 3: protecting security procedures

Casinos are careful about images of their chip racks, cage, count rooms and camera positions. Filming dealer procedures or security layouts could help someone plan a theft or a cheating scheme. That is why staff often stop people from filming near the cage, even if they are happy to let you take a selfie by the entrance. Nevada’s surveillance standards require cameras on every table game area and surface, and casinos would rather nobody mapped where those cameras point.

Reason 4: game pace and table manners

A player who is texting slows the game for everyone. At a busy blackjack table, every pause costs the others hands per hour, and dealers are trained to keep the game moving. Loud calls at the table also annoy other players. “Step away to take a call” is as much etiquette as security; our guide to how to behave at a casino table covers the rest of the unwritten rules.

The Nevada sportsbook phone ban (1999 to 2008)

For about a decade, Nevada did ban phones in one part of the casino. Gaming Commission Regulation 22.135 prohibited using electronic communication devices in race and sports books from around 1999, to stop bettors relaying Nevada betting lines to illegal bookmakers and to stop betting syndicates from using runners. Regulators repealed it with effect from 21 August 2008 (the current Regulation 22 lists 22.135 as “Repealed: 8/21/08”), after deciding the rule was outdated in a world where betting information was freely available online. Some books still ask customers not to talk on the phone while standing at the betting window.

What about phones and online live dealer games?

Online, the phone is the casino. Live dealer studios stream to mobile browsers and apps, and the rules that matter are the operator’s, not the casino floor’s. Eight states have legalised online casinos; seven markets are live (NJ, PA, MI, WV, CT, DE, RI), and Maine legalised a tribal-only market (LD 1164 became law without the governor’s signature in January 2026, effective 29 July 2026) that has not launched as of October 2026. At those state-licensed online casinos, your phone’s location is checked by geolocation software before you can play, because you must be inside the state. Offshore sites that accept US players are not licensed by any state, so there is no state regulator to complain to and your funds are not protected.

Online operators have their own version of the table-phone problem. Their terms usually forbid bots, software that plays for you and sharing information between accounts at the same table, and they can void bets and close accounts that break those rules. Our guides to mobile live dealer casinos, Android live casino apps and whether online casinos track your IP address cover the details.

Practical tips

• Use your phone freely on the slot floor and in restaurants; check signs in the pit.
• At a table, put the phone face down or away while you have a bet in action.
• Step back from the table to take a call or reply to a message.
• Ask before taking a photo near a table, and never film the cage or count areas.
• Do not use any app that tracks cards, predicts results or suggests plays while you are at a casino table.
• If you need to keep in touch with someone, agree a check-in time and step away from the gaming floor to call.

Frequently asked questions

Do casinos block cell phone signals?

No. Using a cell jammer is illegal under federal law, and the FCC prohibits their use, sale and manufacture in the US. Poor signal inside a casino is usually caused by the building’s size and construction, not by blocking.

Can you use your phone at a casino table?

Usually not while you have a bet in action. Most casinos ask players to put phones away during play or step away to use them, to prevent cheating and keep the game moving. Rules vary by property.

Can you take pictures in a casino?

Often in public areas, but many casinos limit or ban photos and video near the gaming tables, the cage and count areas to protect players’ privacy and security procedures. Ask staff if you are unsure.

Is it illegal to use a card counting app in a casino?

Yes, in Nevada. NRS 465.075 bans using or possessing with intent to use any device or software designed to gain an advantage, including one that keeps track of cards, and a first offense is a category C felony.

Can you use your phone in a Nevada sportsbook?

Yes. Nevada banned phones in race and sports books from about 1999 under Regulation 22.135, but the ban was repealed on 21 August 2008.

Why are phones not allowed in casinos?

They often are, just not everywhere. Many casinos let you use your phone at the slot machines, though rules vary by property, but not while you have a bet in action at a table game or a hand in play in the poker room, because a phone can be used to share cards, signal a partner or run a strategy app, and calls slow the game down. Photos and video are restricted to protect other guests’ privacy and the casino’s security procedures.