According to Wired, there are hundreds of irate iPhone users all over Apple’s support forums complaining they are experiencing problems with the 3G network. CNET editors say they are receiving emails concerning 3G issues while Gadget Lab readers have also written in with complains.
At present is unclear whether the issues are network or hardware related, but one Gadget Lab reader said AT&T assures them it is a problem with the iPhone. Problems vary as some say they can only connect to 3G for a few minutes and then get bumped to EDGE and this is happening even in 3G rich coverage areas.
http://blog.wired.com/gadgets/2008/07/iphone-3g-users.html