Actually, Intuit came up with the idea for using mobile phones to accept card payments in 2007 - long before Square. They ran trials in the Bay Area in summer

Actually, Intuit came up with the idea for using mobile phones to accept card payments in 2007 - long before Square. They ran trials in the Bay Area in summer 2008, launched GoPayment properly in early 2009 (with a Bluetooth reader supporting various feature phones), and launched an iPhone app in August 2009. Square announced their card reader in December 2009 and didn't actually launch until the following May.