1- Run ##72786# through your phone dailer. This will only restart your phone and try to repair it. Let the phone completely finish and hit ok where prompted.
2- If option above fails then proceed to next step, but first backup everything you want to your computer or SD card as the next steps will factory reset your phone.
3- For those of you having this problems.
- Samsung displayed in the pull down menu as well as in the network type.
- Initial customization settings have been lost, and the My Account app has been replaced with a MobileZone app that doesn't work due to the system upgrade to KitKat.
There is a fix in the PlayStore, its a app called Refresh Customization by Samsung mno. download the app and select Opt1, if it is unsuccessful try Opt2.