Verizon Wireless and (NYSE:VZ) Comcast (NASDAQ:CMCSA) are expanding their co-branding and cross-selling efforts in several states. The two service providers have begun selling each other's services in Connecticut, California, Florida, Massachusetts, Maine, Maryland, New Hampshire, Ohio, Pennsylvania, Texas, Vermont, Virginia and West Virginia.Verizon Wireless and Comcast have previously introduced offers in other cities in Alabama, Arizona, Arkansas, California, Colorado, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Missouri, Michigan, Minnesota, Mississippi, New Mexico, Oregon, South Carolina, Tennessee, Utah and Washington.