Handset for both cellular telephone and push-to-talk communications

A communication device handset (100) enabled to effect cellular or mobile telephone communications and push-to-talk (PTT) communications is described. The handset (100) comprises a set of functional elements (113, 114, 115, 116) that is operable as at least part of a user interface for cellular telephone communications. The set of functional elements (113, 114, 115, 116) is also operable as a full user interface for PTT communications. By sharing a set of functional elements (113, 114, 115, 116) between two communication types in this manner, the total number of components required by the handset (100) may be reduced. Also disclosed is a method of operating a push-to-talk communications device.