: Mobile phone is a source of potentially harmful radiation. The form of signals in two radiation field, the near magnetic field and the remote magnetic field. This research is quantitative, with a cross-sectional approach. The results of the study, the highest standby electromagnetic waves is BlackBerry smartphone, while lowest one is the Samsung. At the calling modes, highest is Blackberry and Nokia and the lowest one is Samsung. At the receiving modes the biggest wave is Blackberry, lowest is Samsung. Based on the results of the ANOVA test it was found that there is a significant difference (p = 0.003, p 0.05). Therefore, no difference statistically and required further analysis (post-hoc) to test the Least Significant Difference (LSD) or the Least Significance difference (LSD). There is a significant difference between the top of the electromagnetic wave smartphone brands Samsung, Nokia, and Blackberry at the time of call. While all four brands of smartphones is apparently the difference electromagnetic waves of the Samsung and Nokia with significant difference (p = 0.001), followed by the differences between the Samsung and Blackberry (p = 0.002). It can also take a look at the difference in the mean difference of the four brands of electromagnetic waves where the average difference between Nokia and Samsung is the smallest (-4.035), followed by the difference between the Samsung with Blackberry (-4.001)