A method of customizing hardware by an end user for a mobile phone is provided. The method includes receiving from an end-user a selection of a mobile phone shell from a set of mobile phone shells, sending to the end-user a subset of interchangeable hardware components having different functions, and receiving from the end-user a selection of at least one hardware component from the subset of interchangeable hardware components. The subset of interchangeable hardware components is generated based on a compatibility between the selected mobile phone shell and the set of available interchangeable hardware components.