Thank you so much, this worked for me. (SGH-999 on T-Mobile USA).
My question is why the **** do they set it up this way? Every android I've ever used had developer options available at all times. It's not documented anywhere this method you provided. So, what, we're supposed to just spend an hour on Google Search until we're lucky enough to find the answer? I don't understand why companies think this is a good idea, all it does is waste everyone's time. ******* infuriating and just increases my belief that everyone running a large company is a worthless *****.