Remove "No SIM Card in Phone" message
You can remove the "No SIM" notification from the Galaxy S3 S4 and Note 3 by adding an entry to your build.prop. You need root to do this.

I recommend using JRummy's Build Prop Editor. Once you've installed it, launch the app and click the bottom right icon (a + sign).

In the first box you can enter a description like so (this is optional):

# Remove "No SIM" from notification bar


In the second box, enter:

ro.config.donot_nosim= true


Then save and reboot.

If the "No SIM" popup still shows, or you get the "No SIM" notification icon, then look for an entry that reads:

ro.config.tima=1


and change that to:

ro.config.donot_nosim= true


If that still doesn't work, try removing ro.config.tima=1 or set it to 0 instead of 1.

You can also add sys.hiddenmenu.enable=1 to enable the hidden menu if it isn't already in your build.prop.