I just change my phone to an N9 now, I found I cannot use 3G...
I called customer service this afternoon, but it still not working.
Any solution for this? It is a international unlocked phone.
As long as you're in an area with 3G signal you should have no problem with N9. It supports all of the necessary bands and I had no trouble using N8 (same frequencies supported) on AT&T 3G.
N8 settings allowed me to turn off 3G radio, I imagine N9 settings allow you to do the same. Check to make sure it is not turned off and make sure there's AT&T 3G signal available in your area.
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