Mavic has no Bluetooth so obviously
Hotspot phone in settings. Choose Bluetooth as means of connecting to hotspot..
Connect iPad to phone via search wifi network, Bluetooth shows up and connect.
Turn on drone.
Using IPad now fly either by wifi connecting drone or with the controller and iPad is now connected to a wifi network...(to your phones hotspot using Bluetooth, sparing iPad wifi to use for drone wifi or just fly with controller as normal) iPad will act like you're at home depending on your phones connection to the 3 or 4g network..
Any combination of iPads tablets or iPhones work.
I turn on hotspot on my Samsung phone, choose Bluetooth then connect to hotspot via iPad wifi network search. Shows a wifi hotspot up that will connect via Bluetooth.
Fly as you want using iPad. Can even connect another phone if using litchi app while second phone / device is connected to hotspot and use litchi view to have flight stream to that device. (Litchi offers it as part of the app)
Basically your phone is now a wifi hub using Bluetooth. iPad wifi is free to use as you wish.
Edit to say obviously enable Bluetooth on all devices.
Happy flying.
Sent from my iPad using
MavicPilots