I-Phone 6 recognize problem?

Fix iPhone Not Recognize Router:

Reset your network settings on your iPhone:

WARNING: By doing this process you'll lose passwords you entered on already joined internet connections. This means you'll have to re enter the password again to that internet connection if there is one.

• Open Settings
• Tap General
• Tap Reset 
• Tap Reset Network Settings
• If you're prompted for a pass code enter it.
• Tap Reset Network Settings
• Different Apple screens will appear after this for about a couple seconds to a minute.
• Once it finishes it'll take you to your lock screen if there is one.

From there you'll enter your pass code if there is one if not it it'll automatically take you to the home screen.

• Tap Settings again
•  Tap Wi-Fi
• Tap the network name
• Enter the network password/pass code if there is one.

If not just select the network and you'll be able to join. (Unless you're using a public internet connection such as Wi-Fi from McDonald's you'll have to agree to the providers internet terms and agreement before being able to join).

- Tap Join - It should take a second to join the network.