Rare wifi issue

[totalia]

I have a D-link router connected with 3 PC and other phones through the wifi
but there is this really weird problem which I havent figured out why its happening, is that when I connect one of the phones sony Z1 to the wifi the internet goes really slow or sometimes doesnt work and when I turn it off everything works normally , I even assigned static ip to some devices so they dont get conflicted with each other but doesnt seem working whenever I turn the sony z1 wifi on

 

[DelJo63]

The Sony Zi spec says

Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA,

enough to drown the environment.

Get the spec for your D-Link and see what BAND and what MODE you are actually using,

Recommend ALL devices (including the router itself) on the same band/mode
The most general is the 2.4ghz band and G mode.
A better would be 2.4ghz and N mode.
The best would be 5ghz AC mode, but this will restrict the range.

Use ONE Band and One Mode only - - everywhere.

 

[totalia]

These are the settings , forgot to mention any other phone connect works fine , but not the sony z1 the phone it self work with no problem but other devices get affected

 

[DelJo63]

The outer looks good to me - - 2.4ghz N mode.

Can you determine how the Z1 is configured?

 

[totalia]

I recently did a factory reset for the phone so its just few social apps installed

 

[DelJo63]

I was asking if you can get details of the WiFi connection itself from the Z1?

 

[totalia]

Tell me if you meant other settings or this is the one