Smart tv developer mode?

Typ ue48h6690. İch kann nicht meine smart tv developer mode aktivieren. Smart hub /apps/12345 ist funktioniert nicht.

Some users have reported they needed to use an auxiliary keyboard on newer devices.

Ron
Samsung Developer Relations

My device is UA43N5300 and I start develop mode buti can’t install apps in this mode as I preaa long on apps to get new menue with IP settings to add apps IP