I'm at a complete loss with this one, so hopefully someone has some tips... I have an iPhone 3GS (3.1.3) and my wife and I each have Dell PCs (Vista). We share a wireless network with our landlords who are decidedly Mac folks and use Apple's AirPort WiFi routers. Our internet connections had been working fine until about a week ago, when all three of our "computers" (2 PCs and an iPhone) no longer discovered the network. This went on for a couple days and we figured the entire network was down. But after we talked to our landlords, we discovered that they had been connecting the whole time without any issues. So we tried various things to get the connection back. They are using one primary router, and two other routers in an attempt to broadcast the signal thorughout the entire residence (it's large). I thought that this combination of routers might have something to do with it. Sure enough, my Dell was able to discover and connect to the network while standing next to the primary router. So we played around with the other "boosters" and ended up finding out that if we changed the order of them, we were now able to connect on our two PCs. This was all fine, but still left the question of what happened in the first place, since we had previously had no problems with the original layout of AirPorts. BUT, even now that our two Dell computers are working and picking up a very strong signal (the AirPort is now only a few feet away from us), my iPhone finds absolutely NOTHING! I have never had any problems connecting to this nextwork, but now it can't even find it, despite the fact that the two Dell's can. So I tried the iPhone in other areas, and can confirm that the WiFi still works as it should - no problems at all. But when I get back home I've got nothing. There is also a neighbour's WiFi that I can pick up with my Dell, but my iPhone doesn't find that either (I can't be sure that the iPhone ever discovered that, but I assume it used to). To make matters even stranger, my landlord has an iPad, and it has no problem connecting to the network either. I have stood beside her and the router while she has a connection, and I have nothing. I have tried several things I found on other forums. - I have reset network settings several times - I have restarted, rebooted, resprung, etc several times - I have played around with different combination of the above steps while having WiFi turned off/on, 3G off/on, data roaming off/on etc - I have updated the firmware from 3.1.3 to 4.0.1 (jailbroken) with no success, and then I went through all the above steps again. - I have tried accessing WiFi through 3rd party apps, like WiFiFoFum etc. Everything works, just not here. From what I can tell, SOMETHING happened about a week ago that caused all of our three devices to no longer recognize the network. It didn't affect the landlords two Macs or their iPad, though. For some reason, it's affected my iPhone's ability to recognize the network at all, even though whatever happened has evidently been fixed. Does anyone have any ideas?!