BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a high level block diagram showing a mobile communication system according to an embodiment of the present invention.
FIG. 2 is a high level data flow diagram showing a concurrency application server that communications with a library component in a mobile device according to embodiments of the present invention.
FIG. 3 is an electrical block diagram of a mobile device according to an embodiment of the present invention.
FIG. 4 is a block diagram of the software architecture of the concurrency application system according to an embodiment of the present invention.
FIG. 5 is a block diagram showing how the concurrency application server interacts between digital content servers and sites and mobile devices according to embodiments of the present invention.
FIG. 6 is a flow diagram for a method according to an embodiment of the invention in which a mobile device user may select digital content to be used as a ringback tone for calls from another mobile device user.
FIG. 7 is a flow diagram for a method according to an embodiment of the invention in which a caller may select digital content to be used as a ringback tone when calling a mobile device user.
FIG. 8 is a flow diagram for a method according to an embodiment of the invention in which a caller can recommend digital content to a mobile device user.
FIGS. 9 and 10 are flow diagrams for methods according to embodiments of the invention in which mobile device user preferences for digital content downloads is used to enable a mobile device user to select content suitable to other mobile device users.
FIG. 11 is a flow diagram for a method according to an embodiment of the invention in which mobile device users may rate digital media content.
FIG. 12 is a flow diagram for a method according to an embodiment of the invention in which mobile device users may earn points for promoting sales of digital content to other mobile device users.