Just a few minutes ago, we received news that SingTelrevisedtheir iPhone price plans. Instead of the respective 500MB, 1GB bundled traffic for the different plans. Singtel is bundling 12GB bundled data and if you exceed the 12GB limit, the maximum extra charges for data is capped at $30.
M1 has 10GB limit and capped it at S$36. Starhub has 12GB limit and capped it to S$48.