Check the Rates for Incoming Calls, Outgoing Calls and Roaming Rates (rates for when you’re in that country) on Google Voice / Google Project Fi using the table below:
Join Google’s project Fi with this referral code and you’ll get a $20 credit on your bill.
408-256-0700 is the phone number Google Fi assigns to the caller ID of known spam calls.
According to Google:
Update: This issue has been fixed with Android 6.0
You may see spam calls from +1-408-256-0700 on Bluetooth watches connected to a Project Fi phone. This is the number Project Fi uses when it identifies a spam call. It only appears on your watch and doesn’t ring your phone. When you see the number, please ignore it.
If you are seeing this number on your device, you may be using project Fi on an iPhone or non-fi device. You can ignore these spam calls.
According to Reddit user and claimed 911 dispatcher prynsys03, 4082560700 is also used as the caller ID on 911 call back numbers and calls made to the spring and T-Mobile MSID assigned to your phone:
In order to access the Sprint and Tmobile networks, each Project Fi customer was assigned a MSID (mobile service ID) that allows access to each network. The MSID is basically a phone number that connects you with Sprint and Tmobile. So, technically you have 3 phone numbers! Yes 3! When someone calls your MSID for Sprint or Tmobile, it rings into your Project Fi phone and displays 408 256 0700 as the caller ID. The reason you may be getting so many calls is because the MSID you were given is a recycled phone number! DO NOT block that number! If you ever have to call 911 and have to hang up, the dispatcher will not be able to contact you back! The dispatcher is not provided your “real” phone number. Instead we are provided your Tmobile or Sprint MSID, depending on which tower you used to make the call. So if we have to call you back and you block 408 256 0700, we cannot get through!
In a white box with a green wrapping titled “Thanks Again.”, some original Google Project Fi backers are receiving thank you packages from Google.
This particular thank you package was sent as a Fedex Shipment from INGRAM MICRO INC/BRANCH #40 – CAROL STREAM, IL US – Purchase order number MORSCRYcaqs32R , 12x9x5 in. 2 lbs
— Luke S Rehmann (@lukerehmann) May 6, 2016