Galaxy note 3
Hi Lee, have you made sure that you have a SIM card properly inserted inside your Samsung Galaxy Note 3? If so, then better check to make sure that Airplane Mode isn't activated by looking at the notifications bar at the top of the screen. If there is an icon of an airplane there, that means that Airplane Mode is active, and that may be why you can't connect to the network. You can toggle it off by going to the quick settings menu by swiping down from the notifications bar. Let us know if that answered your question.