Quite excited about our upcoming (2nd) trip to Australia in a couple of days. I have a quick question about pocket WiFi. I have the device I bought 5 years ago as well as a couple of SIM cards for our unlocked iPhone. The pocket WiFi is 3G. Will this still be useful or will it be sufficient/about the same cost to buy data for the SIM cards for the unlocked phone? We will have rental cars in Margaret River and outside Melbourne, which is what I will need the data for (google maps) as well as for wandering around the cities (again, google maps). Thanks!