What should I do if I cannot turn on the camera app?

a) Clear the cache of the ‘Camera’ app.
To clear an app’s cache: go to main menu->select “Settings”->“Apps”->select “View all apps”->select “Camera”->select “Storage & cache”->select “CLEAR DATA’ and “CLEAR CACHE”.
b) Clear the cache of the ‘Gallery’ app.
To clear an app’s cache: go to main menu->select “Settings”->“Apps”->select “View all apps”->select “Gallery”->select “Storage & cache”->select “CLEAR DATA” and “CLEAR CACHE”.
c) Check if a third-party camera app is installed. If yes, please uninstall any third-party camera apps.
d) 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 (or Alcatel) website or APP “Support center”.