Replace Demo content with fully functional one So I have iPhone 5c ME561LP/A with demo content. Can I replace the demo content with fully functional iOS?
Probably, all you should have to do is wipe and restore it to the latest iOS version via iTunes:


  Use iTunes on your Mac or PC to restore your iPhone, iPad, or iPod to factory settings
  
  A factory restore erases the information and settings on your iPhone, iPad, or iPod and installs the latest iOS or iPod software.