Setting up a cellular home phone

T-Mobile's version of the landline service you are talking about was called LineLink. It is not offered anymore so your alternative is to port the number onto a cell phone. I did that with my childhood landline (still amazed that I have been able to keep that number for almost 30 years) and it has been great. The phone is still portable so we can use it anywhere in the home, and I know that my kids have a way to connect to the world without having "their own phone."

Is there something in particular about the home phone that you are trying to keep other than just the phone number?