The country's largest wireless provider teased a few details of its upcoming offerings Tuesday while announcing it had completed its $4.4 billion purchase of AOL Inc. The deal is designed to help Verizon Communications Inc. expand in mobile video and advertising as more hours are spent watching video, reading and shopping on phones and tablets. Verizon's mobile video service will work on competitors' networks as well as on Wi-Fi and will include ad-supported data, says Verizon executive vice president Marni Walden.