So I believe that my iPhone 3GS' wifi is acting screwy since I usually only get 1 wifi bar even though I sit less than 10 ft away from my router. With my old 3G I would always get 3 full bars. I bought the iPhone 3GS less than a week ago. Do I have to go through the hoopla and schedule a Genius appointment (since in New YOrk City the queue is usually a few days out) or can I simply walk in the store and swap for a new one? I also want to point out that I don't want to get a refurbished one...I went through the trouble last time with my old 3G of getting a refurbished and got two lemons in the process.