Besides having the most customers of any U.S. wireless carrier, a combine AT&T/T-Mobile would also have the most impressions, according to mobile ad network InMobi. Based on the 5 billion
impressions generated on InMobi's network in February, a post merger AT&T would capture 35.5% of ad requests, compared to 24.8% for Verizon and 18% for Sprint. AT&T currently accounts for
20.4% of impressions, and T-Mobile, 15.1%.
