With RingTo getting out of the business 3/31/2018 a lot of people are going to be looking for a FREE place to port their numbers for FREE. RingTo met all my requirements.

I know there are a lot VOIP vendors out there. Way too many for me to check out all of them. Hopefully someone will be able to shed some light and help us out.

My requirement is FREE VOIP incoming calls with voice mail only service and Free porting. I do not need outbound calling.

Google Voice is out because of the $20 porting charge (with a lot of hoops).
TextNow is out because no free way of porting a number to their free service.
TalkaTone is out because of their 30 day activity rules.

These are the ones I looked at so far. Can anybody suggest any others I should check out?