It’s super simple for CE
MA2 to FCC - I do it all the time (iOS):
1. Download on windows 3utools
2. Connect iPhone and set your location to USA
3. Start your drone inside the house and make sure there are no satellites avail
4. Once you can see the first line above the 90dbm line remove the cable from phone and stop motor
5. Take drone outside, start drone without having your phone connected.
6. Connect your phone - voila
Important is to always remove your cable before you stop the motors.
My record in city (Prague) is 7017 meter so far ... would go further but battery ...