Brief: AT&T is the first brand to sponsor "Harry Potter: Wizards Unite," the mobile game that combines characters from the popular fantasy franchise with the augmented reality (AR) playability of "Pokémon Go," Ad Age reported. AT&T stores appear as "inns" and "fortresses" in the game.Cricket Wireless, the AT&T-owned provider of prepaid cellular plans, will be added to the game on July 15. When the rollout is complete, players can visit the more than 10,000 AT&T and Cricket stores to recharge their energy level, find challenges or see virtual wizards and magical creatures.As part of last year's acquisition of Time Warner, AT&T gained the video game rights to "Harry Potter." Its WB Games division collaborated with game developer Niantic, creator of "Pokémon Go," to release the new game last week. Insight: