I'm trying to determine whether iOS prefers 2.4 or 5 Ghz when all things are equal. The reason I ask is that I've read that Apple recommends using the same SSID and security settings for multiple Wifi networks and that people have reported that iOS prefers 5 Ghz in that set up, but I haven't found that to be the case. My setup is that I have a Linksys E3000 which is dual band. The 2.4 Ghz band is set up b/g/n while the 5 Ghz is set to n only. Other than that and the channel the settings are the same. Both use WPA2 personal. For a long time I gave the 2.4 and 5 Ghz networks different SSIDs so I could choose which band to join. The reason being that the 5 Ghz one is significantly faster (at least 3 to 4 times) than the 2.4 Ghz one and there are many neighboring 2.4 networks which cause interference. Also there are g devices on the 2.4 network. The 5 GHz one doesn't have the range that the 2.4 one does. With that setup my iPhone 5s tends to jump on to the 2.4 network and stay there, but my iPad Air 2 will stay on the 5 one if I put it there. I recently got a WeMo which for some reason only allows local connections on the same SSID (have no idea why), so if my devices are on the 5 Ghz network, they behave as if I'm not home. To get around this I set the 2.4 and 5 network to the same SSID, assuming that the 5 network would be preferred, but that's not what I'm seeing. With my iPhone and iPad sitting next to the router, both join the 2.4 network. If I turn Wifi off on the iPad and back on, it will join the 2.4 network again, but will usually switch to the 5 and stay there until I get about 20 feet from the router at which point it jumps to 2.4 and stays there even if I move back to being right next to the router and sit there for 5 minutes. Basically the only time it joins the 5 Ghz network is if I turn Wifi off and on, which is extremely inconvenient. The difference in speeds on the iPad can be as high as 5 Mbps compared to 200 Mbps, so obviously I'd prefer it to be on the faster 5 network. The only info I've found from Apple is http://support.apple.com/en-us/HT202831 which states that all things being equal iOS prefers the stronger RSSI, but stronger RSSI doesn't mean faster or even stable, depending on interference. 2.4 almost always had a stronger RSSI because of it's very nature of the frequency. Any ideas why iOS is preferring 2.4 for me when others say it prefers 5 Ghz? Is it simply RSSI strength? If so iOS would never join a 5 Ghz network if a 2.4 one was nearby.