Hi PedroTibo
Yes, I had the same soon after I got this phone. It's merely telling you that your notification is turned off. It's an 'I' with a line through - ie 'no information'
So, pull down the notification area (not sure what it is called) so that you can see the buttons for turning on/off wifi, GPS, Sound, Screen Rot, Power Saving, Notification, and so forth.
Tap Notification button to turn it back on. You will see it light up again!
Hopefully, that should sort it ...
Cheers