iPhone 7 Wifi Connectivity Issue

[dibley1973]

iPhone 7 Wifi Connectivity Issue

We have an issue at home where the two iPhone 7s often will not connect or if they do hold a connection.

We have multiple other devices, both Apple and non-Apple who connect fine and hold their connection. It is only the two iPhone 7s which are experiencing this issue. The iPhone 6, iPhone 5, iPad 2, iPad mini, iMac, two Android phones, one Android tablet and Windows laptop all connect without issue.

WiFi Infrastructure:

• Sky Broadband SR102, connected to internet and working as Fibre broadband modem, DHCP server and WiFi access point and router
• Sky Broadband SR101, connected to SR102 by LAN cable, DHCP disabled, working as WiFi access point and router
• NetGear WNR2200, connected to SR102 by LAN cable, DHCP disabled, working as WiFi access point and router. Also has Guest account enabled.

All WiFi access points have the same SID broadcast, the same encryption type and same password. All three broadcast on different channels, which only overlap slightly according to “WiFi Analyser” application. All WiFi is 2.4GHz. No 5Ghz in house.

Solutions which have not worked for us are:

• Disconnecting and reconnecting WiFi on iPhone7
• Renewing the lease on the iPhone7
• Restarting the iPhone7
• Forgetting WiFi network and readding it on iPhone7
• Restarting all of the routers
• Allowing SR102 to dynamically assign all IP addresses
• Giving all frequently active devices in house static IP addresses in the device access list on the SR102. The static IP addresses are based upon MAC address. The SR102 still hands out dynamic IP addresses to any other device.
• Setting static IP addresses (to match those set on SR102) on iPhone7s
• Resetting network settings on iPhone7
• Turning Bluetooth off on iPhone7 (advice from forum posts - not practical and did not work)
• Disconnect all IP6 DHCP

We have been to the Apple store and had twenty minutes with a genius, but after running a diagnostic tool on phone he was unable to offer anything other than what we had already tried except a full factory reset to new phone state, which is less than ideal for us.

I have seen posts on the various where other iPhone7 users having this issue can be sat next to partners with iPhone6, iPhone5, Android phones or iPads who can connect perfectly. It seems to be quite a common affliction to the iPhone7.

Please can anyone offer any other advice? Thanks in advance.