Phantom 3 Standard - MISSIONS???

I have been trying like crazy to get missions to work with my Phantom 3 Standard, with the Java android mobile SDK v4.16.2

Everything works on my Phantom 4.

But on Phantom 3 Standard, i always get this error:

Why? My mission loads, which means it verifies format etc. It just can never upload

I put it in F-GPS mode (function mode?) and tried all 3 S1 stick positions but nothing ever works.

In the app it shows as GPS_ATTI even though i didn’t change the switch position at all.

Why can’t i get any missions to work in Phantom 3 Standard??