Hi,
I have an n900 an 3G isn't working on any network with UMTS 900
Optus, and Vodaphone are both 3G networks with UMTS 900, but when I try connecting to them they say 'no access' I can only get 2g with their networks.

Also note that both networks have UMTS2100, and that isn't working either.

It would just be a 3G problem, but Telstra, which is a UMTS 850/UMTS 2100 network works fine .
So I'm guessing the issue is with UMTS 900 supported networks?? Any ideas how to fix my phone?
My friends have the same phone and it works fine on those networks.
I reflashed with the nokia firmware update tool, still only getting 2G on optus and vodaphone..

Hope someone can help..