Zynga and wireless service provider AT&T announced a partnership today that brings customized content in Zynga mobile games like Words With Friends and Zynga Poker to AT&T’s shelf in Android Market later this year.

Though the content was not described in detail, the press release indicates that it will be available from within the game. Additionally, Zynga will offer free in-game currency as part of the partnership and participate in giveaways at AT&T sponsored events. The partnership also features a testing component for different game mechanics, network solutions, and battery-saving techniques for games on various AT&T Android devices.

Zynga has been actively improving its mobile strategy through acquisitions and by releasing mobile versions of its best-performing Facebook titles like CityVille Hometown. Its recently-released standalone mobile title, Hanging With Friends, currently ranks in the top 10 apps across both paid and free versions as recorded by AppData’s iOS tracking service. Neither Hometown nor Hanging has an Android version live as of yet, but both titles are expected to make the jump in the near future.

The terms of the agreement with AT&T were not disclosed.