Once updated, launch the app and check if the Google Duo not working issue has been rectified or not.
Fix 4: Disable Data Saver
If you have changed the network mode but still facing the said issue, then it might be the case of data restriction mode enabled inside the app. This model tries to minimize the use of the internet up to the least possible extent. But sometimes it might cause an issue or two. So head over to the Duo app on your iOS or Android device and tap on the overflow icon situated at the top right. Select Settings from the list followed by Call Settings. Now make sure that the Data saver mode toggle has been disabled, if not do it right away.

Likewise, Android users should also check that the device data saver mode has been disabled as well. To do so, head over to Settings on your device and tap on Network and Internet. Within that, tap on the Data Saver option and disable the switch, if it has been enabled. This should fix the Duo not working problem.
Fix 5: Grant it Necessary Permissions
If the app hasn’t been given all the necessary permissions, then it won’t be able to function properly on your device. In the case of Duo, Camera, Contacts, Microphone, and Storage are the permissions that need to be enabled. Therefore make sure all these needed permissions have been enabled for this app. If you are an Android user, then follow the below steps:

- Head over to Settings on your Android device.
- Next, tap on Apps and Notifications followed by App Info.
- Now search for Google Duo and within that, tap on Permissions.
- Make sure the required permissions fall under the Allowed section.
On the other hand, if you are an iOS user, then open the Settings menu and tap on Google Duo. Now check if all the mentioned permissions have been enabled or not. Once granted, the Duo not working problem should have been fixed. if it hasn’t been yet, then follow the next method.
Fix 6: Clear Cache and Data
if a lot of old data, temporary files, cache, and cookies get accrued over time, then not only does it consumes unnecessary storage space, but it also causes issues in the proper running of the app. And the same might be the case here as well. So go ahead and delete the Cache and Data of Duo as follows:

- Head over to the Setting page and tap on Apps and Notifications.
- Now tap on App Info and search for Google Duo.
- Within that, tap on the Storage and Cache option.
- Finally, tap on Clear Storage (Clear Data). No need to clear cache as clearing the data will wipe the cache as well.
- Once that is done, launch the app and see if the Google Duo not working problem has been corrected or not.
Fix 7: Reinstall the App
This fix may not apply to all Android devices. This is because, in most devices, Google Duo comes preinstalled on your device, and hence can’t be removed. For others, you coul try the below steps to uninstall the app.

- Open the Settings menu on your device.
- Go to Apps and Notifications and tap on App Info.
- Next up, look for the Google Duo app.
- Within that, tap on Uninstall. In the confirmation dialog box that appears, tap on Uninstall.
- Now download the app for your Android or iOS device. Launch it and now the problem should no longer be there.
Conclusion
So with that, we conclude the guide on how to fix the Google Duo not working problem. We have shared seven different types of fixes, any one of which should fix your issue. Do let us know which one managed to do so, in the comments section below. Likewise, also check out our iPhone Tips and Tricks, PC tips and tricks, and Android Tips and Trick as well.