Yes,
The iPhone works without service provider,
Airplane mode OFF! Wifi ON.
You can download apps via PC. ( through ITUNES )
Or go to mcdonalds restaurant and use their free wifi!
You will first want to download
1) PC assistant software
2) phantom DRIVER ( allows communication between PC and phantom )
( this is so you can adjust settings, calibrate, ect! )
Download ( DJI APP )
Turn on controller
Turn on extender
Turn on Phantom
Turn on phone, click SETTINGS, click WIFI, wait till you
See " phantom0000000 " ( your number will be unique )
Ie: phantom3788432 or something like that
Click on the " phantom000000 " to connect to its wifi signal
Press home button on iPhone to exit out of settings
Open DJI APP
CLICK CAMERA
( you should see live feed )
( DO A FRESH COMPASS CALIBRATION BEFORE FIRST FLIGHT )
Wait for satellite, and home lock, go fly!
Take care fly safe