Mine now works on 4G LTE. Two days ago I registered my system and yesterday my iPhone 5s down loaded the app update (it did this during the prior evening automatically). Yesterday morning I could connect with cellular data. I did nothing else... but it works now.

I have the same issues. When connected to my Wifi network everything is fine. In Settings -> Reolink, I have cellular data ON. When I turn off my Wifi and try to open Reolink, I get a pink bar at the top of my iphone screen stating "Network unavialable. Please check the network". I have a 8 channel nvr with 2 bullet RCL-410 and 2 dome RLC-410. HELP.... I want to connect with my phone remotely and see my cameras live. If I cannot, then I have 30 days to return the system with the Amazon 30 day return policy.