Does any one know the internet usuage of motorola Dext?

[cocohamill3]

I am looking into getting a phone in the next month, and liked the look of the new motorola dext, however it uses the "blur" feature. Although i have one concern, and that is whether or not it will exceed the 500mb internet usuage provided by orange, when just using motrblur feature. Please can any one tell me whether this is true, or if possible how much the phone will use in internet allowance?

Thank you in advance