a) Clear the cache of the app.
To clear this app’s cache: go to main menu->select “Settings”->“Apps”->select “VIEW ALL ×× APPS”->select the app from the app list->select “Storage & cache”->select “CLEAR DATA’ and “CLEAR CACHE”.
b) Check if a third-party app with similar features is installed. If yes, please uninstall the third-party app.
c) Try to reset or update your device. (Refer to Q How can I perform a factory reset on my phone & Q How can I upgrade my device).
If the previously described options do not help, you can contact our hotline or repair center to get more professional technical assistance. Find the hotline or repair center information from the TCL website or APP “Support Centre”.