Map tiles downloading

In the section ‘Map tiles downloading’ of the settings you can find the switch ‘Use cellular network’.

If you disable ‘Use celluar network’ map tiles will never be downloaded over a cellular network. This can prevent unwanted cellular downloads if you move the map to an area on which map tiles were not stored offline. Limiting cellular downloads could save you money, depending on your contract. The drawback is that you sometimes could see gray maps.

If you enable ‘Use cellular network’ map tiles can be downloaded over a cellular network. In addition you should enable Topo GPS to use the cellular network in the iOS device settings.