Two-Factor Authentication (2FA) may sometimes cause problems for some devices. At Mercury Cash, we recommend the following process if this problem occurs:
1. Check Time and Date.
Whenever Google Authenticator stops working on your iPhone, you should check the time and date configuration on it. If your device's time and date are incorrect or not properly synced, you might encounter issues using the Google Authenticator app. The app's time and date configuration might also go out of sync if you travel to a different time zone. When that happens, Authenticator won't work. Other times, you might get 'Invalid code' error messages whenever you use the codes generated by the app
iPhone Settings menu and select General
Select Date and Time
Toogle on Set Automatically
2. Restart Iphone.
It is important before restarting the device to verify that Date and Time were set automatically, then proceed to restart the device and try again.
3. Update Google Authenticator
If Google Authenticator still doesn’t work on your iPhone, then you should check whether there are any pending updates for the app. Head over to the App Store and tap the Update button if there’s a new update for the Authenticator available
4. Update IOS
Running the latest version of iOS updates is one of the recommended requirements of using Authenticator. If the app doesn’t work or perhaps you encounter some issues during usage, check that your iPhone’s operating system runs the latest version available. Navigate to Settings > General > Software Update and tap the ‘Download and Install’ button to update your OS.