On the subject of wireless... Is there an iPhone 6-7-?-friendly router for home broadband? Mine suffers from the issue where the phone doesn’t properly talk to the dual frequency wireless on OEM routers that come with BT, Plusnet, Vodafone etc home broadband. Setting it to single frequency doesn’t really help. Doesn’t have the problem on wireless anywhere else so I’m pointing finger at the router itself.
This may not help as it's similar to what you have already done, but I got a legacy phone to connect to my Vodafone OEM router by setting up the second WiFi network with parameters suitable for the phone, while leaving all the modern devices connected to the primary (dual frequency) network.
On the subject of wireless... Is there an iPhone 6-7-?-friendly router for home broadband? Mine suffers from the issue where the phone doesn’t properly talk to the dual frequency wireless on OEM routers that come with BT, Plusnet, Vodafone etc home broadband. Setting it to single frequency doesn’t really help. Doesn’t have the problem on wireless anywhere else so I’m pointing finger at the router itself.