How much does tethering cost on 3?

I live in the uk and I'm on contact with 3. I'm currently paying £42 a month and have all-you-can-eat data. If I tether my iPhone to my laptop, how much will it cost?

If you are on the one plan (and for £42 a month i'm guessing you are) it is free
I can verify this as i have the one plan and i'm using my phone as a Wi-Fi router right now. I download gig and gigs and never get charged a bean.

if you are not on the one plan the you need to buy an add-on through the "my account" page on their website, It's £5.11 for 2 gigs, otherwise they charge you by the meg
http://ask3.three.co.uk/srvs/cgi-bin/webisapi.dll/,/?new, kb=mobile, ts=mobile, t=casedoc.tem, case=obj(3536), varset_username=Mobile: mobileUser

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