Is there a way to configure my phone to use my cell data when the connected Wi-Fi is not working\unavailable, etc?
Assuming you are talking about Wifi being activated, then in this case, Wifi and Cellular Data are exclusive, you cannot have one activated and yet use the other. A flip-flop operation, switch on Wifi, Cellular Data is off, switch off Wifi, Cellular Data is on. Cannot have both!
- Check the firmware - perhaps a newer update is available? What version of Android are you referring to?
Quite possibly, Izzy's solution of using Tasker might suffice, this was answeredanswered recently?
