Macau’s ban on the use of mobile phones in casinos is less than a month old and technological workarounds are already in play.

On May 9, Macau casinos began enforcing the ban on the use of phones at gaming tables, a step widely perceived as a way to stamp out so-called ‘proxy’ betting, in which the person seated at the table relays real-time card info to the real gambler on the Chinese mainland.

On Wednesday, Bloomberg reported that at least three junket operators claimed to be still conducting proxy betting by equipping the proxy with an earpiece wirelessly connected to his mobile phone. The junkets said the proxies sometimes used their hair to help conceal the earpieces.

Other junkets are reportedly using two-man teams, with the proxy at the table keeping up a loud commentary on the table action, while his accomplice (with an open line to the actual gambler) sits within earshot.