Pete, when you reach Shanghai I'll come to you to guide you through the city if I still have my bike at that time. If not I can still come by taxi to meet you outside of the town, then hop behind you to guide you !

About the GPS : when Celine bought me this phone as a gift, she insisted to find the smartphone with the best GPS software, and that's the only thing I can tell you ! It is really a matter of the GPS system and software already in the phone, nothing you can really do about it, at least it's my understanding...
As you saw, the only thing I'm doing on the road is :
- put on the internet mobile and the GPS
- open the Google Maps app

And yes it's true that the localization is very precise, without any offset (which is not the case with others maps app like OruxMaps).

About Shanghai : we're terribly sorry with Celine, but we will not be able to welcome you in our apartment and offer you a room, as we do not have an apartment anymore ! We stopped the rent when we left for the trip, and a friend will welcome us in his place when we arrive tomorrow until we take our plane on July 1st... Just thought you should know, sorry mate...