I have a connection of 500Mbps. I clock speeds of 460-480Mbps when plugged in (Ethernet, Cat5e).

But when I’m on Wi-Fi (even positioned above the router, 5GHz dual-channel 802.11ac) I clock speeds of only 260-280Mbps on an iPhone 6 (802.11ac).

My question is if I double my ISP connection to 1000Mbps, will the max. Wi-Fi speed of 260-280Mbps I get on my iPhone 6 double or stay the same?