Ooma.

there is a fourm on broadband reports that discusses which VoIP providers support LNP (local number portability)
http://www.broadbandreports.com/forum/r20920967-General-VoIP-providers-with-LNP-Support

hi,

i am not sure which is the cheapest provider but here’s a website that looks promising

http://tinyurl.com/npjaug

you can ask them about your concern anyway

hope it helps

I would recommend Phone Power, the first month including them shipping you the device is $32.88. You can also save a few bucks going through http://www.voiprater.com they generally post any discounts or coupon codes etc. if they are available. You will also get a free second phone lined during the current promotion.

As for Vonage, sometimes they are a pain to get to switch your phone number over to any other service. If you had it before and ported to them then it is pretty easy to get them to release it again. Good luck in your search!