This was posted in 2015 for a Phantom 3 and the DJI GO app.
Right now it's 2017, you have a Mavic which uses the DJI GO4 app.
So a different craft, different app and different technique.
My advice would be,.....don't even try.
Besides your drone is by software CE compliant and has a range of 4km.
How much more range do you want?