Mail carriers are assisted in delivering mail pieces. Each group of mail pieces is received from a sorting system, for delivery to respective final destinations. Also, the sorting system provides delivery data, preferably in electronic form, about delivering the group of mail pieces. Subsequently, GPS is used to determine a location of the mail carrier along a mail route. Information is then provided to the mail carrier regarding delivery of the group of mail pieces, in response to the location of the mail carrier and in response to the delivery data that was received from the sorting system.