Hi, I would like to ask the ff: 1. Are you experiencing any random system freezes?(touchpad and keyboard is not responding). I am experiencing random freezes. Just got the unit today, luckily I can have it unit replaced within 1 week's time. 2. Are you able to successfully USB Tether an android phone using Horndis? Planning to Tether my Galaxy S4 to it, but the phone's not getting detected. Thanks for the inputs. My first time to get a Mac and is deeply saddened with the random freezes.