1. A data communications device, comprising: a receiver for receiving items of textual information, a plurality of keys each associated with a respective plurality of different text characters, the keys being operable by the user to produce an ambiguous key sequence corresponding to an item of textual information, a memory configuration to store different ones of said ambiguous key sequences and to associate with each thereof at least one item of textual information corresponding to the ambiguous key sequence, a data processor operable in response to the user actuating the keys to produce one of the ambiguous key sequences, to retrieve the textual information associated therewith from the memory configuration to permit the user to disambiguate the key sequence, wherein the receiver is coupled to the memory configuration, and is operable to identify, based on knowledge of the association of text characters to the plurality of keys, an ambiguous key sequence corresponding to an item of received textual information, and to store the item of received textual information in the memory configuration such that it is associated with the identified ambiguous key sequence.