No error message just says call fail then asks me to try again I get 3 beeps through the ear piece , when someone rings me it does nothing at all . Also no messages

Please help my 3g iPhone won't make or take calls messages I have a full signal stopped working at 3 pm today could be an update problem , I have done the usual reset , power off , sim out, reset firmware nothing has changed just lost all my numbers , also been in contact with apple they ain't got a ...