OTTAWA - Canada's wireless service providers will introduce inter-carrier multimedia message services (MMS) to wireless phone customers across the country on July 1. This is the broadest initiative of its kind in North America, says the the Canadian Wireless Telecommunications Association (CWTA). The move will enable customers with MMS-capable mobile phones, regardless of the customer's wireless service provider, to instantly send and receive messages with rich content to and from the MMS-capable phones of friends, family and colleagues. MMS, commonly referred to as picture messaging or video messaging, extends text messaging to include photos, video clips, graphics, audio clips or...