Did you mean, you want to keep your current phone number? You can keep your current phone number. You don't have to cancel the landline, if you dont want to. You just need to add unifi, that comes with its own voip phone which you can choose not to use it. That means you will have two separate bills. One bill is your current landline phone bills. Another bill is unifi bill (this bills will include internet + voip phone charges, if you use the phone).

By default, they wont do it for you. They simply say it cannot be done... I guess, they may do it if you offer lots of money + some strong cable connection. All people had to change phone numbers, and all these people also had the same wish like you.... to retain same number.

i see... ok. best of luck for you..