Q: Iphone6

Hello, Roomter. 

Thank you for visiting Apple Support Communities. 

I understand that your iPhone 6 has a delay when connecting to your Wi-Fi network.  Keep in mind that the delay in connecting to your Wi-Fi network can be normal as this is a feature used to conserve battery life.  I would need more information regarding your router type, password protocol used and iOS software installed to provided a better answer.  However, try updating your router firmware and go through the troubleshooting steps in the article below. 

iOS: Troubleshooting Wi-Fi networks and connections

http://support.apple.com/en-us/TS1398

iOS and OS X: Recommended settings for Wi-Fi routers and access points

http://support.apple.com/en-us/HT202068

Cheers,

Jason H.