Whilst commenting @Anonymous whilst this was not part of your question, if you do use up your allowance and want more data before your next billing cycle you can add a one off bolt on via myo2 of either 500mb or 1gb for an additional charge.
It used to be that data was slowed down when you used your allowance. Now it stops completely. As said, you can get a data bolt on if you wish or simply use wifi.
