Where can I find the most up to date cell mast locations?
There are no specific sites with 100% accurate locations for cell masts as carriers do not openly advertise this information.
Cell Mapper is a community lead tool which is useful to get a general overview of where masts might be placed. It does not always provide the correct location of a mast.
To use Cell Mapper, all you need to do is select which provider you want to go with and what network you are looking to connect to. For example, you would select EE and 4G-LTE if you were looking to get an idea of where EE’s 4G masts are.