[Q] AT&T / T-Mobile- Is 3G Available on Same Device for Both Carriers ?

[going_home]

In my quest to find my daughter an ATT Nexus One I ended up with
one that only gets the Edge network on ATT.
I'm assuming this is a T-Mobile Nexus One.

So in my continued quest to find an ATT Nexus One I ran across a guy that said that you can change any Nexus One to run 3G on either carrier by dialing

*#*#4646#*#* and changing a setting.

Is this true ????

I didnt think that sounded right so here I am asking you geniuses
what is the real deal on this.

Thanks for your help.

 

[going_home]

Ok got my answer over on XDA :

Not true. It's a hardware issue.

The att nexus has 850/1900/2100 as 3g freq's, while the T-Mobile nexus has 900/1700/2100. Att needs 850/1900.