Contract upgrade

The service received was excellent. It was also convenient inasmuch as I am not able to get out very much. However, I had wanted to possibly add an additional contract or add another device to my present one which will have entailed being done at a branch. Your connection is by far the best so I would prefer not to have to use additional devices from other servers. This does not relate to your survey but given the offer on data, why has a contract for day time only and/or one for night time never been looked into. It saves endless hours of sleep time and hence wasted data.