As mobile commerce (m-commerce) activities worldwide are rapidly increasing, users' concerns over information privacy are arising. However, there has been little empirical research in this area. This paper attempts to study consumers' concerns for information privacy (CFIP) in the context of m-commerce, by analyzing the privacy concerns of mobile phone consumers in the United States and Korea. The descriptive statistics reveal that among ten categories of popular mobile activities, email and mobile payment are the only two activities that were conducted by more US users than Korean users. The statistical analysis finds that Korean users show significantly less concern over mobile privacy than the US users. This indicates an important cultural difference. In countries with collectivist cultural values, people are less concerned over individual information privacy than people in countries where individual freedom or individualism is emphasized. Other mobile users' demographic attributes (age, gender and experience) and their correlations with information privacy concerns are also studied in this paper from the cross-cultural perspective in the context of m-commerce.