Iphone 5S unable to connect to Wi-Fi network?

My Iphone is able to connect to all networks except for one. But the network works with everyone elses phone. I have tried unplugging the router, turning off my phone, resetting the network settings and nothing works. It always just says "Unable to join network "Network Name". I go to this place very often so it would really help if I had Wi-Fi.

Other Iphone 5S users are able to use it? If so, yours is defective or in need of an update. If not, then you have discovered a once common, now quite rare, inter-vendor compatibility issue for Wi-Fi. Specifically, some implementations of authentication methods are known to vary between vendors where a specific authentication method fails with a specific client (usually WPA or WPA2 personal).

Log into the router and check if there's any limit applied on no of users that can connect to the router at any given time if there's any remove it. Also try changing the wireless broadcasting channel in wireless settings from auto to something like 13 or 11 to avoid any intereference causing delay in DHCP handshake with your iphone.

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