Some other handy features include an answer/end/reject call button, last number redial function, voice dial (when supported by mobile phone) and volume control.
This could be for a number of reasons including the caller has decided to redial and select another option from the pre-recorded menu or police assistance is no longer required.
Dropped calls may also become less of a nuisance, as phones will automatically try to redial the number should the communication be cut mid conversation.
