WiFI & MHL cable?

[JPN]

After connecting the MHL cable the WiFi data transfer stops. The WiFi connection looks OK but video streaming doesn't work, should it?

[Phy]

Check if it works on safe mode

How to boot on safe mode.
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

[JPN]

Yes, same happens in the Safemode. After the MHL is pluged in  the WLan gives the Authentication problem.error.

[Uliwooly]

Which MHL cable are you using?

[JPN]

The MHL-cable is Ebay unmarked one. Seems that the next of TV the signal is a bit weak and MHL box emits that much noise that Wifi was blocked. With the stronger signal works OK.

[Uliwooly]

@JPN

That could be the cause. 

[SergioPL1]

Does it have power source connected? You may run out of power or EMI interference. 

I use MHL without any issues on both radio bands.