I changed my plan on the 18/7 from 500 to 1000mb. My refresh date was 21/7, so 3 days before refresh date. On my bill received 21/7 It says the amount you rolled over from the previous month to last month was (-922). How have they worked that out?
Best answer by Ryan
When changing your plan, you will not be able to carry data over from that current month as you need to be on the plan for a full month before data rollover kicks in.