In the article "Cell Phones as a Tool to Increase Communication and User Location Awareness", author Albrecht Schmidt explains that cell phones must allow communication at any time . But he writes that "the fact that the phone accompanies the user makes it an interesting platform for creating persuasive applications and for use as an environmental display." It states that cell phones provide functions that allow people to communicate with others. For example, cell phones are used to stay in touch with someone and for use in emergencies. Additionally, Schmidt says people can carry cell phones with them by keeping them in shopping bags, purses and school backpacks because they are small and easy to carry. Cell phones are not dangerous because they bring people support when they need something, especially if it was a problem