Yes, it's that simple. Connect the phone to pc and run it.
And you can't install asian ruu because software checks for cid. And since you don't have any of asian cid's...
I already have JB in my phone, but i hate the t-mobile logo when switching on/off. I know changing cid wud be very difficult for me, i searched it, found some threads, but i guess it is only for s4 phones, not sure though.
But anyway is that link (above) for global phones? I think evn after installing that rom i ll still get updates from t-mob cz knstead of directly getting it from htc?
Sent from my HTC One S using xda app-developers app