Connections and notifications in general

Go to iPhone → Settings → Notifications and check the following settings for each application. 

・" Allow notifications" turned on.

・Go to Notifications → Lock screen. Make sure there is a check mark next to "Notification Center, Banner" for each notification.is checked for each.

・Make sure "Show preview" is set to "Always" or "Only when unlocked".

・For email, go to Mail→Notification. There you will find the above settings for each account. 

・For social networking applications such as LINE, check the notification settings in the application as well.