I bought my 3GS on Monday, push worked fine when i got it. Jailbroke it, push didn't work at all. Restored to 3.1, push works on 3G/EDGE but not wifi. Restored again, still doesn't work on wifi. The problem is I have no cell reception at home, so push working on wifi is pretty important to me. Is there anything I can do other than exchange my phone at the ATT store?