May 24,2009 13:19
at&t iphone 3.0 beta 5 could not activate cellular data network
Go to www.unlockit.co.nz on your iphone (this must be done from your phone for this to work, so either use wifi or disable 3G to use edge to get the connection.)
Follow the instructions on the site as follows:
1. Choose "create custom APN"
2. In the available fields, type:
APN: wap.cingular
Username: wap@cingulargprs.com
Password: cingular1
3. Select "Create Custom Profile"
4. When the Custom APN icon comes up in what looks like the settings page, Click INSTALL.
All Done!! Your 3G service should be reinstated and working properly without having to use the iPhone Config Utility.
copy from http://fav.or.it/post/1419558
引用URL
http://cgi.blog.roodo.com/trackback/9055397