The solution to this is to SSH/SCP into the iPhone /System/Library/Frameworks/CoreTelephony.framework/Support/ and transferred the UnknownCarrier.plist file to you desktop and edit with TextEdit on mac, or note pad on windows.
Just look for the section that specifies the APN settings and fill in the blanks appropriately, for example:
Code:
<array>
<dict>
<key>apn</key>
<string>internet.com</string>
<key>password</key>
<string>wap</string>
<key>username</key>
<string>wapuser1</string>
</dict>
<dict>
<key>apn</key>
<string>internet.com</string>
<key>password</key>
<string>wap</string>
<key>username</key>
<string>wapuser1</string>
</dict>
</array>
(The above settings are for Rogers Wireless -- obviously if you're on another carrier you will need to enter the APN settings appropriate for your carrier).
Than uploaded back to the same place and override the original but first make a backup just in case than reboot your iPhone
/System/Library/Frameworks/CoreTelephony.framework/Support/
Hope this Help.