Your Premiere supports an IR remote. You might be able to find a generic IR remote at a store nearby, but make sure they state they have Roku codes available. But the basic answer is, there's no way to connect the Roku to a wireless network without a remote of some kind.
Dan
Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
