Hi,
After the lollipop upgrade, my wifi connectivity at home became extremely unstable. It would work for a few moments and then disconnect, sometimes reporting an authentication error.
No other devices on the network were struggling, including a nexus 4 running lollipop. The Z3 would work fine on other networks at work etc and was ok when on KitKat.
I am running custom DD-WRT routers at home which were running WPA2/TKIP encryption.
I enabled developer debugging mode and searched the logs files but there were no messages being logged when the wifi dropped.
Sonys Online chat was the usual, it must be your ISPs fault.
I deleted my google settings backup and did a full repair from the PC client but after a couple of hours the issue returned.
The Authenticion Error sometimes reported in the wifi network list led me to start adjusting the encryption method my routers used.
Once I changed the encyption methods from TKIP to AES all of the issues went away.
I'm not sure if it is an issue with Sony's TKIP handling (I suspect it is as no other devices had issues) but everythink has been working fine for 5 days since changing it.
I'm just posting this incase anyone else encounters the same issue I had with my Z3 because I was on the verge of taking it back for a refund as it was useless to me at home.
Cheers
