Not sure if this problem exists in update 5 and earlier (I bought the device not too long before update 7 was released), but connman is being ridiculously unreliable. Connection would drop randomly and I couldn't seem to find a pattern. I am suspecting this has something to do with it, but am not sure how to actually find the correlation. Is there a test plan I can follow to actually help in catching the random connection drop problem so I can file a proper bug report somewhere?