There are different types of verification that can be done in the real world. But since these accounts are online, verification is limited to Phone calls and text messaging. Although, some Exchange websites will ask you for utility bill, driver's license and government documents.
Google 2 step verification helps a user secure his/her account particularly if such user logs in on different devices frequently. This is done such that after the normal password is requested, another code is also requested for logging in.Six digit numbers are sent to the user specified mobile no at anytime he attempts to log in on a different device.
Nigeria is excluded from the list of countries eligible for Google's 2 step verification service for reasons best known to Google but for business purposes and to have the ability to use mail applications such as Thunderbird and Microsoft outlook, here comes a method for verification.
Simply use online message services to receive your message anytime you try to log in on any computer or device. Click here to pick a number you can use for your Google 2 step verification and receive your future six digits code online.