This invention describes a method for sharing of application specific objects between communication devices (e.g., a mobile communication device or a mobile phone) using middleware containing a peer-to-peer engine. This engine is completely peer-to-peer based and no servers are needed in the network. Especially games are seen as a promising potential application for the invention. An application registers to the peer-to-peer (P2P) engine when it wants to share or download files. The P2P engine takes care of the file sharing and informs when a new file has been downloaded so the application can start using it and the P2P engine delivers them to the appropriate application directories. The P2P engine can use either a 2G or 3G general packet radio system (GPRS), a wideband code division multiple access (WCDMA) or a Bluetooth as a transport for the file sharing and the choice of the transport is left to the user.