The device offline issue generally occurs due to the network signal coverage in your surrounding area. Ensure the device firmware is up to date and restart myFirst Fone R1s by press hold 3 buttons together for 10-15 second. Also, proceed to uninstall and reinstall the myFirst Fone app on your mobile.
We are using 2 types of GPS location positioning method:
a. GPS (By detecting the satellite and triangulate the location)
b. WIFI Indoor positioning (Powered by Google)
Since it detect the Satellite signal and using triangulate to detect the distance. The building internally has no signal so when you are indoor, can't detect the GPS and will get the location outside the building.
As Google know each SSID location and IP address, we do not need the WIFI router password as we don't connect to the router but we are using the Router WIFI Signal to triangulate the indoor location. WIFI need to be turned on in watch" for the WIFI section.
Quite accurate for indoor position but sometime detected some WIFI mobile router or mobile phone hotspot that will create error in location. That might suddenly off few KM away or detected tourist mobile WIFI which it will drift to a location between countries.