I am looking to cancel my Bell home phone service. i understand I need to give 30 days notice, is this correct?

I have a grandfathered Bell Highspeed Unlimited bandwidth account using the same line that I want to retain as is.

Any tips, pointers, and stuff to avoid? I don't really trust Bell. Do I just call Bell to cancel the home phone? Will my Net service be disrupted? Is there a surcharge for 'dry loop'? Any suggestions would be appreciated.