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If you're going off the grid in Australia, you can still use the GPS function of your mobile phone to track your location or use some track mobile number Australia free . All you need is a map app that supports offline maps, such as EyeZy, uMobix, mSpy, . These apps allow you to download maps of the areas you'll be visiting and use them offline to navigate and track your location. Just make sure to bring a portable charger to keep your phone charged.