An IMSI Catcher can simulate a mobile phone cell of a network operator. Thus, the IMEI number of surrounding devices can be found out. The International Mobile Equipment Identity (IMEI) number is a unique 15-digit serial number. Meanwhile there are devices for listening to connections. The costs range from 300 to 300,000 Euro.
Contactless payment is on the rise. It works in seconds and is available at more and more locations. This is made possible by so-called Near Field Communication (NFC). This works with EC and credit cards, but also with mobile devices such as smartphones or intelligent watches.