Any experience with this? I bought 3 gdots from a today WMNM and 1 of the 3 worked fine, but the other 2 didn't, and when I try to check the balance using the 1800 number, it says "this is not a valid gift card" and to go back to the place you purchased it. Anybody have any experience dealing with this? My first thought was activation lag, but since 1 of the 3 worked I don't see why the other 2 wouldn't.