I bought Lumia 640 and 640 XL today. I connected them to my home WiFi, however after about 30 minutes to 1 hour, both of my phones suddenly disconnected from WiFi and when I try to reconnect them, my home WiFi is not in the WiFi list. I need to restart the phone or switch off and on the airplane mode in order to reconnect to my WiFi. Anyone has this issue?

What channels do your router use? try change it to other channels

-Double-

This post has been edited by OvenBaked: Jun 15 2015, 08:58 PM

I'm using Channel 12, which is one and only me using around my neihgbourhood.

Try between Channels 1~11.

I remember having similar issue with wifi signal dropping on my Lumia mobile. After changing my wifi encryption setting in router from aes to mix of tkip+aes the issue seems to have magically gone

http://www.microsoft.com/en-in/mobile/supp...&topic=FA139362

This post has been edited by FourZeroFour: Jun 30 2015, 12:12 PM

I'll give it a try later.

Actually this is sort of bugs for wifi connections in Microsoft products.

it is best to try using channel 1-11, 12,13,14 is corporate/industrial standard, some build in wifi on laptop cant detect wireless with channel 12-14, may see it but cant connect have to do manual changes in driver