You might as well buy a brand new unlocked note 2 like I did. I stick with prepaid and use google voice while at home. While I am out of the house I simply forward calls to my cell. I use wifi for data. Costs me a whole $10 a month.
For anyone really wondering. I use an obi110 with google voice and a regular cordless phone at home. This is 100% free after buying the equipment. Google voice allows you to forward calls to any number. Any time I leave the house, I have calls sent to my cell phone. The number I give out to people is my google voice number. This is also free. As for cell service, just pick the best prepaid option you can get.
out of curiosity where did you buy your galaxy note 2