Yep. Walked in to the ATT store, told them my GPS didn't work and I wanted a new phone. They were skeptical, until I dialed *#*#1472365#*#* and then "get position test". Nothing happened. Guy says OK, lets get you a new one. 10 minutes later I have a new Captivate, walk outside, test the position, and bam. 11 satellite locks. Turned GPS on and off, restarted phone several times... still working. Been using navigation all day no problems. Take 10 minutes out of your day and go get an exchange. The more you sit around bitching about it, the less time you have to return it. You can exchange that iPhone 4 all day, but your antenna is still broken.