Re: inaccurate headline
"So actually, it's an iOS6 issue then, not iPhone 5 specifically?"
It seems to be.
I experienced this problem when I upgraded an iPad to iOS 6. However, not being content with just grousing about it, and having the problem on my home WiFi network but not on other WiFi networks, I set out to do some trial and error to try to track down exactly what was happening.
First bit of faffing quickly showed that the problem went away if I used WPA or WEP encryption or no encryption at all, but appeared if I used WPA2.
I'd also been having trouble with my Mac desktop losing signal from my home router, so replaced the router for that reason and found--surprise!--that the connectivity problems with the iPad went away, even with WPA2.
So I invited a bunch of friends with various gizmos over and played a game of swap-the-routers, and here's what I found:
iPhone 5 running iOS 6:
Would not connect to an Asus router with WPA2. Would connect with WPA or WEP, or no security.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
iPad running iOS 5:
Connected to an Asus router with WPA2, WPA, and WEP.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
Same iPad running iOS 6:
Would not connect to an Asus router with WPA2. Would connect with WPA or WEP, or no security; signal always showed as weak.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
iMac running OS X 10.6.8:
Would not connect reliably to an Asus router with WPA2. (connection dropped every fifteen minutes or so.) Would connect with WPA or WEP, or no security, but with some reliably problems.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
iMac running OS X 10.8.1:
Would not connect to an Asus router with WPA2. Would connect with WPA or WEP, or no security, but the connection dropped often.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
Dell laptop running Windows 7 (Home, I think)
Would not connect to an Asus router *at all*, regardless of security settings. Tried everything.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
Dell laptop running Windows Vista; internal WiFi broken, using a cheapie no-name WiFi dongle:
Connected to an Asus router with WPA2, WPA, and WEP.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
No-name desktop running Windows XP:
Connected to an Asus router with WPA2, WPA, and WEP.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
Dell desktop running Windows 7 home:
Connected to an Asus router with WPA2, WPA, and WEP.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
Nintendo Wii:
Would not connect to an Asus router with WPA2. Did connect with WPA or WEP, but connection kept dropping.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
Sony Playstation 3:
Connected to an Asus router with WPA2, WPA, and WEP.
Connected with a Netgear router using WPA2, WPA, and WEP.
Connected to a Linksys router using WPA2, WPA, and WEP.
Conclusions:
1. Yes, there is a problem in iOS 6. For me, at least, it seems related to WPA2 on certain routers. Folks aren't making it up; the problem is there.
2. The router/WPA2 combination problem isn't (necessarily) unique to Apple.
3. Asus routers are a bit rubbish.