Police arrested a man in Ginza, Tokyo, for allegedly using a fake cell tower to disrupt mobile services and send suspicious text messages. The case centres on a rogue radio device prosecutors say was used to interfere with a major mobile carrier’s network in the shopping district. Police believe the equipment was an IMSI catcher, a device that collects mobile phone identifying numbers. They suspect it emitted strong radio signals to push nearby handsets onto an older 2G network before sending them text messages. Investigators are also looking for links to a phishing scheme carried out using illegal radio signals. The man was referred to prosecutors on Monday, with the investigation continuing. Legal status: arrested, referred to prosecutors, investigation ongoing.