idxman01- Just throwing this out there, may or may not help. I had that happen to me a month and a half ago. ZD1100 would hang up on upgrade. Went over it with tech support and they said its bad RAM. I cant upgrade the firmware anymore. However i can...
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I'm having similar issues. Guest network has been set up with many different configurations (I've gone through WLANS, Access Control, Roles, Guest Access, Hotspot / 2.0, also VLAN pooling) but iPhones cannot connect.