I am using Lumia 520 smartphone. I am using truecaller app in it. It is working fine before I have updated it few days ago. Now whenever I get a call truecaller is not showing anything and not even popping up. Previously it is working fine. Suggest some way to fix this problem.
The Nokia Lumia 520 runs on Microsoft Windows Phone 8 and can be upgraded until Microsoft Windows Phone 8.1. Since I’m not sure what version you are using though you said you already updated to the latest version, try downloading the new version again. Visit Truecaller for Windows Phone with your web browser to download Truecaller 4.2.3.0.
It supports handsets running on Windows Phone 7.5, Windows Phone 8, and Windows Phone 8.1. You can download it either via PC or with your mobile phone. Once installed, try using it again and see if it is now working.
In case it doesn’t work, since your phone can be updated to Windows Phone 8.1, try updating your phone’s firmware. For more information, you may visit How to Update Windows Phone.
