Motricity may no longer be providing the back-end infrastructure to AT&T as it prepares to launch its upcoming AppCenter, which will be replacing MEdia Mall as its downloadable content storefront this summer.

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Instead, AT&T may have chosen Amdocs (NYSE: DOX), reports mobile-ent.biz, which saw documents advising content providers that they’ll be transitioned to Amdoc’s Qpass platform in August. But regardless, Motricity will continue to work with AT&T, and provides technology for the AT&T’s mobile browser, third-party SMS traffic in addition to its storefront services, said Motricity’s Chief Strategy and Marketing Officer Jim Ryan, who joined the company 60 days ago and once was in charge of data services at AT&T (NYSE: T).

Ryan declined to comment directly on whether Motricity will continue to provide storefront services to AT&T going forward, but he said: “I know all the folks over there and we continue to be friends. It’s all good. The storefront is something we are aware of and something we mutually agreed on.” Going forward, he said they are carefully picking areas they want to focus on as part of their larger strategy. Amdocs declined to comment and AT&T did not reply to requests for comment.