4. The telephone device according to claim 1 , wherein using the located at least one keyword to obtain the identification of the graphical image comprises using the located at least one keyword as an index into a mapping data structure that contains a plurality of entries, each entry comprising an index value and a corresponding graphical image identification, each of the index values comprising at least one keyword for matching against the index.
4. The telephone device according to claim 1 , wherein using the located at least one keyword to obtain the identification of the graphical image comprises using the located at least one keyword as an index into a mapping data structure that contains a plurality of entries, each entry comprising an index value and a corresponding graphical image identification, each of the index values comprising at least one keyword for matching against the index. 5. The telephone device according to claim 4 , further comprising: providing, as the obtained identification of the graphical image responsive to failing to match the located at least one keyword to any of the plurality of index values, an identification of a default graphical image.