I have my Fios wireless router in the garage. My home office is on the topmost floor in the corner furthest away from the garage. My gaming PC and work laptop are connected to a switch that is connected via the wall Ethernet outlet. This is perfectly fine for those two machines, but I get garbage reception for my phone and tablet in this room.

Should I change the switch to a wireless router? I assume a WiFi repeater wouldn’t work, unless it’s place on a lower floor with decent reception, since these don’t have an input Ethernet port and receive the signal wirelessly themselves?