We are a family of 4 going to Italy for 10 days. We don't need to call or text anyone but want the option when not in Wi-Fi range to be able to use Uber and online maps etc. What is the best option for us? I was thinking of only using 2 of the phones (the others can just use the free wifi when in the hotel) because if we separate, I want both groups of 2 to be able to navigate the country