Totally calling that line (from a Google voice number obtained on a VM) to chat with the underpaid folks about the inanity of their job but how they should take that paycheck and also demand more because the lines are flooded.
when you open an IP connection for your phone call or your VPN, there need three packages to be sent back and forth. you won't get the second one if you spoofed the IP, hence the call or VPN won't even start.
i don't think that means what you think it does. it just changes who knows your IP to another node. if you want to establish a connection there will be someone who knows your real IP. how else will you recieve a reply package to complete a connection?