You would just go to a Bell store, or Bell retailer and do an
ESN change. Beware there will be a charge for this. Likely from Bell and from the retailer. Mobile Browser is a feature that is only meant for a phone, NOT for a
PDA. The feature is not compatible with
PDA's so when you do the
ESN change it will be removed. Even if you do not add a separate data package you will still be able to connect to the internet, but it will really cost you. If you want to use the IE feature, you should add a data package to your plan. This varies from $25 to $100+ per month depending on how much surfing and emailing you are planning to do. The speed you will connect with is totally dependent on the device you are connecting, and since you didn't give us a model # or make, it is hard to judge.
Most newbie's would probably just be happy using it as a
pda and phone and forgetting browsing and email. You may want to consider this. Most people who do use the data features are folks who can really make it pay, ie; real estate agents, costly equipment buyers/sellers, etc. These bills can typically average $200 per month. If this sounds like a lot, I'd really recommend staying away from the data portion.
Hope this helps.
D