Does my tier get upgraded and downgraded immediately or do I need to wait until the end of the 6-month cycle?

Tier upgrades are awarded when you achieve the required Digi Points – this usually takes place within 48 hours from a qualifying Prepaid Reload or Postpaid Bill generation. Tier downgrades will only be reflected at the start of the next 6-month cycle on 1st January or 1st July.