(Warning, duplicate post)
AT&T replaced the phone on 7/3. So far using WiFi at only two facilities, I've had mixed results. One facility experienced the same unsuccessful problem with obtaining and keeping a WiFi connection, plus it's previously described schizophrenic behavior. The other was successful but not perfection. At least I'm able to make and complete phone calls without 4-5 attempts. i will continue to post my WiFi experience with this phone for those with similar problems.