Updated to Os4 (with iPhone 3G) and can't connect to home WIFI?

You're not the only one. Rumours suggest changing wifi on router to not use wpa2 as ios4 has a bug

 

Yup. I've got exactly the same problem. I'll try the non-WPA2 change and see if it works.

 

That did the trick! Changed from "WPA2" to "WPA/WPA2 Personal" in AirPort Utility. Now the WIFI shows up as before.

Whew. I wasn't relishing having to restore to pre-iOS 4 software.

 

A few more facts:

I may be the original source (on macworld's forum) of the rumored incompatibility of ios4 with WPA2, as an Apple tech instructed me to downgrade wireless security to WEP from WPA2 to get my iphone 3gs with ios4 connecting to the network again. It worked.

Oddly enough, a few days later (unhappy to be stuck using WEP) I tried going back to WPA2 security on my airport extreme and both my 3gs and my new iphone 4 seemed to work fine with it. Then today, my iphone 4 started losing wifi intermittently. Like Jsn, I changed network security to WPA/WPA2 and, voila, consistent wifi restored!

Presumably Apple will sort this out with a software update soon.

 

Try pre-loading your WiFi config into the phone via a profile from iPhone Configuration Utility ... it worked for me (3GS to an Airport Extreme on WPA2 only)

 

Mine works fine until I turn my phone off then on. Them it does not automatically reconnect to the network

 

Any update?

Hello,

This is still a problem with IOS 4.0.1 on a 3GS; any word on whether this is fixed in 4.0.2?

Thanks,
Mark

 

Well, I can confirm that 4.0.2 does not fix the problem.

Mark