Can you have a phone with you during a chess game?

• Devices: no electronic device not specifically approved by the arbiter, anywhere in the playing venue.
• In a bag: an event may allow a device kept in a bag, completely switched off. The bag is placed as agreed with the arbiter and not used without permission.
• On the person: the player loses the game and the opponent wins. An event may set a less severe penalty.
• Searches: the arbiter may require clothes, bags or the body to be inspected, in private, by a person of the same gender.
• No help: no notes, sources of information or advice. No analysing on another board.
• Leaving: a player needs the arbiter's permission to leave the playing venue, and the player whose turn it is needs permission to leave the playing area.
• No distraction: including unreasonable claims, unreasonable draw offers and noise.
• Finished players: count as spectators.
• Spectators: may not interfere. Someone who sees an irregularity may tell only the arbiter.

The glossary has the arbiter, the engine analysis, the draw offer, the scoring, the FIDE body and the chess clock.

A phone can run a program that plays better than any person, so a single glance can decide a game. The rule cannot depend on proving that a device was used. It bans having one. The other conduct rules protect the same thing from older threats: a whispered hint or a note.