A mobile unit for transmitting and receiving radio frequency signals to and from a communications network comprising: means for receiving a radio frequency message from the network; a display for displaying said message; a switch actuatable to specify a portion of the displayed message for which a user desires retransmission from the communications network; means for transmitting, only upon actuation of the switch, a signal to the communications network requesting retransmission of said specified portion of said message; and means for receiving said specified portion retransmitted from the communications network and for displaying the received specified portion on the display. view more

The mobile unit of claim 1, wherein the signal transmitted by the transmitting means indicates to the network that the user has read the message.