Method and system for registration of licensed modules in mobile devices. The present invention provides for a registration system to determine active use of licensed modules installed in mobile devices such as wireless cellular terminals and PDA's. The registration system can be made to operate in a manner that is substantially transparent to the user of the mobile device. In example embodiments, a module handler within the processor platform of the mobile device collects module parameters as necessary and causes registration messages to be assembled and sent. In some embodiments, encryption is provided. User interaction with the registration process can also optionally be accommodated. Additionally, the module handler can direct that use of the software module or package is restricted until an acknowledgement is returned from the module activation system, confirming the registration.