As you can see from below screen shot, The browser’s user agent string (UA) mentions a LG G3 S handset with the model number D724. The handset runs on Android 6.0.1 build MMB29V.
*Please notes that the data shown above could be fake.
It seems that some one is testing Android 6.0.1 software on a LG G3 S D724 model!Is LG working on the Android 6.0.1 update for its LG G3 S smart phones.?
In December 2014, LG G2 D802 running Android 5.0.1 was spotted at the same html5test website, and then in April 2015, LG release the Android 5.0 Update for the device.
By the way, LG official has just released the Android 6.0 M build MRA58K for its LG G3 D855 models in European countries.