since you are still on the fido/rogers network, it is NOT called roaming, but since you are OUTSIDE of your calling area it is long distance. it follows pretty much the same rules as your Bell landline does. hamilton to call a mississauga number is LD.
since your physical location is in hamilton, you can use your phone to call within hamilton locally, (unless you have a zone based plan like city fido or urban fido, this does not aply)
There is a nifty page on Fido.ca called the Local Calling Areas. It will give you all the answers you need about local areas and then some. Give it a try. :robotwink:
