this is what you do,
1) download the file attached here and e-mail to yourself, open in mail on iPhone.
2) go to
http://9to5mac.com/iPhone-3G-tethering and follow their instructions to get tethering on.
**When you do step 2 "Cellular Data Network" menu appears under "settings" > "general" > "network"
**MMS is not working for me but the icon does show up and you can select pictures but you get an error when sending... (look a past post pic attachment)
3) when "Cellular Data Network" menu appears go to it and type this info there,
U.S.A
AT&T
APN: wap.cingular
User:
wap@cingulargprs.com
Pw: CINGULAR1
MMSC: mmsc.cingular.com
Proxy: 66.209.11.32
**your VV will not work so I followed the advice from one of the comments on
http://9to5mac.com/iPhone-3G-tethering
"EASY VOICEMAIL FIX! (restores original carrier settings)
Wed, 06/17/2009 - 11:29 ben (not verified) 0 points
Ok heres how you fix your voice mail-
1. Connect the phone to itunes and option click restore
2. Navigate to your user name->Library->iTunes->iPhone Carrier Support
3. Select the file contained within "iPhone Carrier Support" and proceed
You now have your voicemail working again"
6) took out sim and put it back in while restarting the phone.
Theese Instructions are AT&T only! and is what worked for me.