Upgrading from vogue on Bell network

[Snaaky]

A local retailer has a really good sale price on brand new touch diamonds and I would like to upgrade. Unfortunately I have the $7 data deal (called mobile browser but is actually data) with bell and they tell me that it won't transfer over to the diamond. Is there any way of fooling the bell network into thinking that a touch diamond is actually my vogue (htc touch in Canada)? Otherwise I would have to pay $25 per month for a 500mb data plan when I only pay about $7 now for unlimited on my vogue.

Thanks