Concepts and technologies are disclosed herein for separating sensitive data from mobile devices for theft prevention. According to one aspect, a system includes a data security platform and a mobile device platform. The mobile device platform can detect that the data security platform is connected. The mobile device platform can determine whether the data security platform is part of an authenticated pair with the mobile device platform. In response to determining that the data security platform is part of an authenticated pair with the mobile device platform, the mobile device platform can access at least a portion of sensitive data that is stored in a memory component of the data security platform. If the data security platform is disconnected from the mobile device platform, the mobile device platform cannot function or can provide limited functionality, such as a function to communication with a 9-1-1 service.