A British bank says its customers will be able to get cash from its ATMs without a card, using their smartphones instead. Royal Bank of Scotland customers can request up to $150 via their smartphone and will receive a six-digit code to enter into the ATM to receive the cash, the BBC reported Wednesday. RBS said the technology would help customers who had forgotten their bank cards or allow the people to leave their wallets at home in favor of carrying a cellphone. \"It is a really simple and secure way to help our customers get cash whenever and wherever they need it,\" Ben Green, head of mobile at RBS, said. Access to the phone app for requesting cash requires a password, and the withdrawal code will be hidden until the user taps the phone screen, bank officials said, to prevent thieves from looking over the user\'s shoulder to steal the code.