iPhone 4 unable to join 802.11n network

I have a dual band Belkin Play router and it only sees the G network and not the N. The MBP right next to it sees both however. I am scared. Found your post by Google searching my issue. Sounds like it is not a widespread issue OR simply an issue with our network hardware rather than our iPhones. I think its just the two of us though. Ha.

Check your router settings, the iphone 4 is 802.11n 2.4GHz only, not 5Ghz.

Since my router is dual band, the N band will not even broadcast at 2.4 GHz, which is what the iPhone 4 wifi talks to. Thus, my iPhone only sees the 2.4 GHz G band on my router. Generally speaking, a single band N router will automatically broadcast 2.4 GHz to operate with all devices, N, G and B alike. So, if you are rocking a dual band router, your iPhone will never see the N, 5 GHz band. Hope that helps you!

i have a simular issue i have a airport extreme with the 5ghz and 2.4 ghz band, so does that mean my airport will only transmit the N band over 5ghz only if so them my iphone 4 will never see my airport on N band. Which is a real bummer.

I was having the same problem with my iphone 4 and Cisco-Linkys WRT160N router. For me, the bottleneck was with the Network Magic software I was using to control connections to the router. From the Network Magic software, I clicked Tasks>Add a Device and it began searching. While it was searching, from my iphone, I enabled WiFi and then entered my WEP key and it immediately connected. No more "Unable to Join" messages and no more having to use 3G at home!

I have a D-Link DIR-655 router. If I set the router to 802.11g only, the iPhone 4 connects and works fine, speedtest gives me the 12/1 Mbps I have. But if I set the router to 802.11n/g or 802.11n (2.4 Ghz of course), then the Iphone connects (at 39 Mbps according to router) but the connection doesn't work, you cannot navigate and speed gives 0 Mbps download and 50 Kbps upload...
Anyone with the same problem? I think I'm going to open a case both with Apple and D-Link... BTW, I'm using 4.0. IOS on the iPhone 4.

ShesAJar

it worked...good post!!

hi guys have some problemes. im trying to connect my iPhone4 with my WiFi but its unable to join this network..i have the ubnt rooter and i have it with mac address i've add it but nothin workin pls tell me what to do. Btw ubnt working only at 802.11n system

I am still having issues using cisco network magic and my iphone4. How did you add your phone to the network?