Ten years ago, wireless carriers were fighting to recruit new customers and build a nascent market. Today, they are trying to keep customers happy, get people to switch carriers, and convince their customers to spend more on wireless data. Hence, a commercial such as Sprint Nextel's (NYSE:S) long-running Pin Drop silence for long distance might have been successful in boosting brand recognition and corporate image in the past, but would not fare as well in the current market. With this in mind, FierceWireless is taking a close look at the ad campaigns that are working--after all, wireless carriers spend billions of dollars every year in an attempt to push their respective marketing messages. What are some of the industry's most popular ad campaigns? Special Report
