Customers used a remote capture service developed for Apple Inc.'s iPhone to deposit $1.5 million into their accounts in the first three days after USAA Federal Savings Bank introduced it.

USAA of San Antonio announced the application Aug. 11, but customers had begun using it the day before. By Aug. 13, 70,000 customers had installed the application on their phones.

People can use the phone's camera to photograph their checks' front and back, then send the images to the bank for deposit.

"Nearly 50% of our 1 million mobile users are active-duty military, who may be deployed anywhere," Wayne Peacock, USAA's executive vice president of enterprise business operations, said in a press release. "The convenience of mobile access is essential to delivering the highest possible level of customer service."