There has been limited previous research on consumer attitudes towards mobile marketing in the smartphone era, and hence this exploratory study offers some useful insights which could inform both practice and research. In relation to mobile marketing, the findings of this study both confirm and extend previous research. The negative attitudes towards mobile marketing identified in earlier studies based on earlier technologies, persist in the smartphone era. Users continue to view their mobile device as personal, and view text messages from companies as intrusive, and often delete them. The exceptions are text messages concerning mobile ticketing and alert/reminder services, which they presumably regard as useful. Even text messages regarding incentives that were found to be acceptable in earlier studies such as discounts, competitions and gifts are unwelcome. Respondents were concerned about trusting a company with their mobile phone number, but would be happier to receive mobile marketing if they felt they had more control, through, for example, opt-out options. Trust in a company is significantly impacted by the appearance, entertainment, value and functionality of a mobile website. Smartphone users felt more strongly about delivery in these areas than users of older technologies; expectations are increasing.