iphone missing "mode" option in wifi WPA2-Enterprise

On my iPad 2, when I list the wifi networks and choose our WPA2-Enterprise network, there is a "mode" option to choose either Automatic or EAP-TLS.

On my iPhone, that option is not there which means I cannot use my Certificate.

Both devices are running IOS6.

The iPad 2 has version 6.0 (10A403)

The iPhone 5 has version 6.0 (10A405)

I need to connect to my wifi network using a certificate!

Any and all help is welcomed