I have 2 iPhones, a 4 and a 5. Both are on the latest iOS and have the latest version of Maps. On the 4 I can see all the map data like streets, buildings etc, on the 5 all I see is a yellow screen. Even when I zoom right out, every country is the same: there basically is zero data - no roads, etc. The 4 says the data is from 'Tomtom', the 5 says the data is from 'others'. Any ideas how I can force the 5 to use data from Tomtom too? I know I can use Google maps instead but I need the Apple map to work too as that is the map used by 'find my phone', my running app etc. I live in Singapore in case that makes a difference. Thanks.