Rosemont, Illinois-based Wintrust Financial is taking advantage of smartphone technology and its own banking app to allow prestaging of transactions at its ATMs in Chicagoland.

According to a report by the Chicago Tribune, FIS is providing the software to enable cardless capability, and Wintrust is the company's first client to offer the technology in a large-scale launch. The solution will be fully implemented on 190 Wintrust ATMs by the end of February.

BMO Harris Bank currently is in pilot testing mode with its own cardless cash solution, which it expects to roll out to customers later in the first quarter, the Tribune article said.

According to the report, the Wintrust solution works as follows:

Consumers can use their Wintrust mobile app to preset how much money they want to withdraw from the ATM on future visits. Once they arrive at the ATM, they sign into the mobile banking app on their phone with their four-digit password. On the phone, they select the cardless cash option, which then opens the smartphone's camera. Then, on the ATM screen, the customer touches the "cardless cash" button, which creates a QR code... Customers hold their smartphones over the QR code on the ATM screen, tap submit, and the ATM dispenses their cash.