How do you turn off developer mode on an s5? I turned developer options 'off', but is there anything else that needs to be done? Not my phone so don't want to mess anything up :-)
You can actually hide the Developer options permanently from the menu until someone enables it again. Just follow this -  

Menu &gt; Settings &gt; Apps &gt; All apps &gt; (find) Settings &gt; Clear data &gt; Confirm  


Developers options will be turned off automatically although they are enabled by following the above step.