We live in a time where mobile devices are a part of our modern life and that makes it easier for people in the everyday life. There are a large number of functions and technologies in mobile devices that users use on a daily basis which are continuously developed to always be up to date. As the technology is constantly evolving, it means that also security needs to be developed and prioritized more than ever before. Using different features and technologies on mobile devices could lead to a security risk for users, where their private information may be exposed to people who shouldn’t have access to it. Information management on mobile devices has security risks that can lead do consequences for the user. The biggest problem with this is that users are usually unaware of the security risks that exist and can be exposed to it. The purpose of this study is to map how secure users feel when using mobile devices and to measure how users behave on these devices, to compare how secure they actually are against the risks and threats that exist. A combination of a deductive and an inductive approach has been used for this study, in which a literature study has been carried out and a quantitative method in a form of a survey, with a part of a qualitative approach. The survey is targeted at adults from the age of 18 to 65+ years old and who are resident in Sweden. The survey showed that the majority of the respondents feel secure in a general use of mobile devices. This is partly because of the respondents have confidence in well-established manufacturers in the mobile industry and that they have not been exposed to any type of fraud or intrusion previously. This essay is written in swedish only.