I'm using my N900 with the latest firmware (2-2009.51-1), Scandinavia-bought, in China.

The GPS, no matter if using Ovi Maps or Google Maps, is always positioned two or three blocks North-East of my actual position. Hence, the GPS-function is totally worthless.

Is there any way to calibrate the GPS?

Do you use A-GPS? Position both via internal GPS and mobile network, that is.

If your GPS gets a decent lock and seems to follow your position (just with an offset), I'd suspect bad underlying map data (maybe google/ovi have a common provider?) Can you compare it with another GPS device?

Or maybe it thinks that the phone is on a place where you can't be, like GPSes can do if you're on water, they try to map you to the nearest road

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Now playing: Tool - The Grudge

mine does the same if i don't use a-gps. which is a shame if i don't want to or in some cases can not connect to an internet conection.

I use A-GPS. My GPS gets a decent lock and follows my position (with an offset).

I also use A-GPS, inside it at least find what city I'm in but outside I think it locks in ~10 seconds. Luckily I have a unlimited data package so keeping data on 24/7 is not a problem

same here. 1-2 blocks. a-gps normally, but tested without the "a-" and had the same results, only it took longer.

Maemo Mapper and Maep Ovi Maps gives me the correct location, while both Ovi Maps and Google's location are offset.

Try installing http://repository.maemo.org/pool/mae...tion-test-gui/ and see which position it gives. There's also http://talk.maemo.org/showthread.php?p=481473 where people in Hongkong are displayed as being elsewhere. It might just be a bug in Ovi Maps.