This app was mentioned in 6 comments, with an average of 1.50 upvotes
1) Install GrooveIP (https://play.google.com/store/apps/details?id=com.snrblabs.grooveip) and get a free ring.to number with the area code you'd like. Alternatively just get a prepaid SIM with that area code.
2) Port that number to Project Fi.
Try the GrooVe IP or Talkatone app.
https://play.google.com/store/apps/details?id=com.snrblabs.grooveip and https://play.google.com/store/apps/details?id=com.talkatone.android if you have an Android device.
What you could do is get a VoIP app like GrooVe IP or Talkatone, get a free phone number, set it as a forwarding number, then set that to be your phone's number (Google Voice Android app > Settings > Devices and numbers > Change device number). Then under Call forwarding you'll be able to turn on or off forwarding to your actual phone's number and the Google Voice app independently. Once you've verified the alternate number, you can delete the VoIP app.
I spend a lot of time overseas and I absolutely love this app, it's free and even gives me a stateside phone number, area code of my choice https://play.google.com/store/apps/details?id=com.snrblabs.grooveip
This app may be what you're looking for: https://play.google.com/store/apps/details?id=com.snrblabs.grooveip
I'm not entirely clear what you're asking tho.
Hey! RingTo admin here.
If you want to try out our service I'd recommend downloading and setting up GrooveIP . You'll get a free number at sign up and you can start playing around with the service. Once you have your RingTo account you can sign in to our Community and start asking questions (you're welcome to browse around without an account).
We do not have any restrictions on the amount of ported numbers in your account. You can have your GrooveIP number AND your ported # in your account no problem.
If you already have a cell phone and don't want to purchase more hardware, you can configure any RingTo number to ring up to 4 different numbers.
We're working hard on making the Android and iOS apps more featured and adding customizations. If you'd like to join our beta just send us a request here.
Please let me know if you have any more questions and I'll do my best to help ya out.