Silicon Valley buyout firm Silver Lake Partners has acquired a majority stake in Mobile Messenger, a Los Angeles, Calif. provider of technology and services for mobile content management and distribution. Financial terms weren’t disclosed.

Silver Lake invested from its new “Sumeru” fund, focused on small buyout transactions.

Mobile Messenger didn’t say much about where it is making its money, whether its making any money at all, or what sort of clients it has. See statement here. Its product helps manage sales and marketing over mobile networks, including technologies such as SMS/MMS content distribution, campaign creation and management services, media planning and buying, billing process management, customer service and wireless carrier interface operations.