And looking up the Redmi, you may have to talk to them.
http://www.gizmochina.com/2016/01/29/xiaomi-redmi-note-3-wi-fi-issues-worsen-new-update/
I see you almost told what each device was, but all I got on the Dlink is that. Tell more. What settings are other than "stock" as well as the full router model, version and what firmware rev is on it.
I have a dlink router installed at home with cable net which works absolutely fine on some devices and absolutely not oon others.
It works fine with not a single complain with
Dell inspiron laptop
Samsung galaxy s4
Keeps disconnecting or dosent connnect at all with
Xiaomi redmi note3
Ipad mini
Iphone 5s
Windows mobile
Htc phone
Plz help me..i tried connecting these devices to other networks and they work just fine...i even changed my router channel to 1,6 and 11 as suggested by others but all in vain..even tried static ip settings but failed
Please help me

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