Neither my Samsung phone nor my Omni router had a way to only use 2.4 gHz wifi for setup, but I found a way to do it that worked. I could go into my phone hotspot settings and select 5 gHz preferred and leave my wifi enabled. I then connected my laptop to my phone's hotspot which "occupied" the 5 gHz wifi radio. The phone automatically connected to my home wifi using 2.4 gHz. I was then able to successfully set up my camera.
