Can't connect to dual Wifi

[CastorPollux]

Hi, since I changed my router to dual channels the 605 can't connect to WiFi anymore.
Before when I could choose 2,4Ghz or 5Ghz was not any problems.
Can't the 605 connect to a dual band Wifi or what is wrong here?

[ftor]

Hello,
Could you please describe with more details.
Did you see your network SSID?

[CastorPollux]

Well, I'm not a expert about this technical issues but now it connected to router again but from time to time it loses it's connection.
Is there any settings to make it better connected to WiFi?

[ftor]

You didn't thin that it can related to trouble with router, because with old router wasn't troubles