31% of mobile users surveyed by InsightExpress say they will change operators when their contracts expire. When choosing a new plan, 25% of cellphone users say they consider monthly fees, 24% consider carrier brand names and 16% consider the coverage they will get. Respondents told InsightExpress their preferred service providers include AT&T (35%), Nextel (21%) and T-Mobile (13%). eMarketer ? as of August 2003 — estimates that there will be 155.4 million mobile phone subscribers in the US in 2003.