I'm having the same issues, both at home, and at my part time job, and have noticed it at hot spots as well. the iphone 3gs didnt have the issue. it's very frustrating!
i've only had my phone for 4 days, and the guy at the AT&T store didnt want to hear about it "call apple" is the response i got!
i've only had my phone for 4 days, and the guy at the AT&T store didnt want to hear about it "call apple" is the response i got!