Hello,
In my ES-131 I have Broadcom BCM943142Y wifi and bluetooth card. Because I can't connect via Bluetooth any device in Ubuntu 16.04 (and I didn't finy any solution) and some distros doesn't even support this WiFi card (e.g TAILS) and in my opinion signal is generaly weak (my Samsung S5 has better 
) I am looking for replacement. I found that ES1-131 is also shipped with Atheros card. Does anyone can share exact card model? Have any one any experience in Ubuntu with it?