Since Google Voice is now only accessible in the United States, as I've already explained, getting a free Google Voice number directly from Nigeria may not be possible. There are a couple of possible solutions, nevertheless, that you might want to try:
To change your IP address to one that is located in the United States, use a virtual private network (VPN) provider. After that, register for a Google Voice account using a U.S.-based phone number and confirm the account by following Google's instructions.
Use a free trial from a company that offers U.S.-based virtual phone numbers. For a brief period, these services may let you use a U.S.-based phone number that works with Google Voice. If you desire to keep using the service, you may then purchase a number.
You should use caution while utilizing such services since these techniques might not be guaranteed to function and might not adhere to the Google Voice terms of service. Using automated tools or services to establish numerous Google Accounts and use them with Google services is prohibited by Google's terms of service, and if they discover that you are using such tools or services, they may suspend or terminate your accounts.
Additionally, it's possible that utilizing a VPN to register for a Google account violates Google's terms of service.
It's also important to keep in mind that not all Google Voice features, such as call forwarding, text messaging, and voicemail will function even if you acquire a Google Voice number.
Google Voice may not yet be accessible in Nigeria because it is not yet available in all nations.
It's also vital to keep in mind that acquiring a free number might not be possible because the majority of firms that offer phone numbers for Google Voice charge a fee.
Learn more about how to get open a Google voice in Nigeria.