When you want to get access to an account that you do not owned you’ll be restricted by a two-step verification process — which is one of the best way to keep your account secure even if someone has your password. So when anyone tries to gain access and doesn’t have the code pass they can’t get in.
So by using an Authentication app you’re protecting your account and preventing just anybody from gaining access to the account. You can either scan a QR code or have a code texted to you.
If by any means you couldn’t find the phone you can use the backup code that was given to you when you where setting up your app or you can use the QR code. You can import your Google Authentication account to a new phone in other to avoid being lock out.
So to quickly get away from the issue of not gaining access to your account when you change your phone — you’ll have to move Google Authenticator to a new phone.
Transfer Google authenticator
Here is how you can transfer your Google authenticator account to a new phone — you need a computer and your new phone to do this.
1. Download and Install the Google Authenticator app on your new Android or iPhone, and sign in to the app using your Google account. You can download the Google Authenticator app from the Google Play Store or Apple App Store.
2. Open the two-step authenticator page on a PC or Mac browser — just make sure its a computer browser and log in with your Google account. Click on “Move to a different phone.”
3. Click on change phone and select either Android or iPhone — the phone you’re currently using and then click “Continue.” In the next page it will display a barcode on your computer screen.
4. Open the Google Authenticator app on your new phone and begin setup when prompts tap “Scan a barcode” and scan the barcode with on your computer with the new phone.
5. After you scan the barcode, a six-digit will be sent to your Google Authenticator app on your new phone. Enter the code on your computer and click on “Verify.”
Once you verify — you’ll be able to accept and declined access to any account that Google Authenticator is connected with in your new phone.