My friend had one of the basic plans, in the last two months he got a b'band bill of 5k+, so on 1st he rang up & asked to be shifted to the 999 [lan, he was told 'from next month'. He replied in that case he wont use it for one month 😢 hey presto he got a call that evening that it was shifted to the 999 plan 😀. What a llucky guy.