Wifi connection on MacBook 2016 drops off randomly
My MacBook (MacBook (Retina, 12-inch, Early 2015) wifi connection drops off randomly, often every 10 -15 minutes. This doesn't happen with my MacBook air or iPhones on the the same network connection. I can only get around this by turning wifi off and on again or by using "Network Diagnosis". “Wireless Diagnosis" says: "the following nearby networks conflicts with your current country code (DE)" but I do not have access/contact to that owner. Has been like this January and still a problem after latest updates. Quite annoying - any ideas ?
MacBook Pro, OS X Mountain Lion (10.8.4)