I have recently installed the WPA4220 extender and it works fairly well, at roughly 1/4 or 1/3 of the source Wi-Fi network.

At least this is what happens for my PC and iPad. However my iPhone is often much slower.

E.g. this morning dowload speed iPhone 13.6mpbs, PC 56.7mbps.

Is there any specific setting preventing the iPhone to fully exploit the bandwidth?

thanks

valerio