A:Answerprobably not, don't know for sure. I think your number was probably recycled. If you purchase this phone, Ooma will give you a new number. Great purchase!
A:AnswerYes! We ported and on the announced porting day our number was switched within a few hours of the predicted time. And all our phones and alarm system work perfectly.
A:AnswerOnly 2 cables - one is the power cord and the other is an ethernet cable that runs from the back of the Ooma base station to your internet modem/router.
The handsets are wireless except for the power cords.
A:AnswerI don't know the answer to this question. However, I would expect it to be compatible. Your best bet would be to call or email Ooma to confirm.