A:AnswerWhen we started Ooma premium service we used our old answering machine for a while and it worked fine. Eventually we switched to Ooma voice mail and are very happy with it. So you can go either way.
A:AnswerI bought mine at a physical store and it was definitely new. Package was unopened and there were no signs of previous use. I guess it's possible to get one that's been returned by a customer, so check the packaging to make sure it hasn't already been opened. Can't speak for online orders.
A:AnswerYou can link the Ooma Telo to your cell phone service and receive calls from the Ooma system on your cell phone, but this will not improve the signal on the cell service your provider has in your area.
A:AnswerYou should be able to customize from the Ooma web site. Login with your account and go to Preferences > Call Blocking. You can block by number or name.
You can also work with Ooma support as well over chat.