[quote=“KenTaiwan98”]the GPS on my phone unit is particularly useful to me… I rarely get lost now.
And it’s much easier than digging out an A-Z map of Central London… Much.[/quote]
For mapping: there are many apps you can buy that have offline maps. They’re not as good as the Google Maps that the iPhone normally uses, but they’re better than nothing. (Note that the iPhone doesn’t need to use Wifi or 3G to use GPS.)
I’m off to Canada in a month or so, and I’m also wondering the same thing: I’m almost troubled by how much I use my iPhone, and I’ll be looking into pre-paid 3G SIM cards when I arrive in Vancouver. Such things SHOULD exist, but that doesn’t mean they do.
If you look around there are all kinds of “offline” things you can do with mapping and GPS maps - you just have to download the maps when you’re online, and then they’re available for you whenever you want.
Actually, if you’re just in London, look into the Lonely Planet City Guide app - it has pretty good maps, and also information about a reasonable number of restaurants. You don’t need to be online to use it.
EDIT: I assumed you were using an iPhone. Sorry - should have read more carefully.