It's Getting Tougher for Big Banks to Add Mobile Users 

Photographer: Brent Lewin/Bloomberg
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The biggest banks’ push into mobile is running out of low-hanging fruit.

Bank of America Corp. added active mobile customers at a slower pace for at least the fourth quarter in a row in the three months through June, according to the company’s earnings reports. JPMorgan Chase & Co.’s active mobile customers increased 2.4 percent in second quarter. A year earlier, the jump was 4.1 percent.