Why is my ivvi phone cool show turned on and there is no data?

The following actions are recommended:

1. Check whether the mobile phone network connection is stable, and suggest trying to change the wireless network.

2. Try to update the software version.

3. Click on the mobile phone application-Settings-Application Manager-Downloaded-Select the problematic application-Clear the data

4. Back up the data (contacts, text messages, pictures, etc.), restore the factory settings and try to reinstall

5. Update the version of the mobile phone system.