using 3G connection instead of broad band because of stupid SKY

[scottj130208]

I have just moved house and waiting for broad band to be installed next week was meant to be today by sky but apparently there sky local engineer called in sick and sky didn't even inform me that know one was knocking until I called them talk about terrible customer service or lack of it sorry going of subject using my I phone as a portal 3G to wi fi stick in my duo was wondering say if I'm watching a standard def channel for say 30 mins how much megabytes would that be roughly as currently only get 1 gig of data through my mobile provider and is expensive once over the limit

[DOUGALMCD]

You can set the data usage on the phone and check yourself what you are using per day.