A Fortune 500 financial services company offering banking, investing, and insurance to people and families that serve, or served, in the United States military United Services Automobile Association (USAA) last week reported that its mobile banking service though just 10 months old is being consumed by 11.4% of its 7 million members, or about 800,000. This makes USAA a largest mobile banking provider in the country.

According to the report during the ten month period 13 million logins were made through the mobile solution. That makes up for about 3% of its nearly 500 million annual customer contacts. Only Bank of America, with 2.6 million mobile users, has publicly revealed a larger mobile base. That makes USAA number two among known user bases. Meantime, some sources show that Chase/WaMu and Wells Fargo/Wachovia have reached one-million-user mark and are thus second and third largest.

Last week USAA also introduced its Iphone application and now its mobile services can be accessed three ways:

mobile website at <mobile.usaa.com> 
text-message banking (see inset above) 
downloadable app for iPhone (link to app in iTunes) and other phones (via Firethorn)