FOR THOSE RARE TIMES WHEN THERE IS LEFT OVER MONTHLY DATA, IT SHOULD BE ROLLED OVER INTO THE NEXT MONTH. WE HAVE PAID FOR IT SO WE SHOULD NOT LOSE IT. ONE INTERNET COMPANY HAS A NEW PROGRAM CALLED 'DATA STASH' WHICH DOES EXACTLY THAT! TO LOSE SOMETHING YOU HAVE PAID FOR IS NOT GOOD BUSINESS!!!
Data transfer does happen, it does sneak out at times if we let our guard down. We should be able to earn/ keep a buffer.