Originally Posted by Jarnsaxa
No- I don't even know what that stuff is if I'm being honest. I've just used my phone as it is and not tried to customize it at all.
At the moment it is in safe mode and I am happy I can use it for texting and phone calls, as I need it this weekend to contact people. I will of course want to be able to use apps again though so I will need to get it out of safe mode eventually. I didn't get an S4 just to be able to call and text.
It would appear that you inadvertently booted your phone into Safe Mode, see my previous post and how to get out of it. In Safe Mode your apps are limited and it would explain the warning.