You been signed onto this forum for a long time, how many flights have had 20, 200 or more?
What is your current firmware and go-app version.
I will throw some basics at you.
Reboot / restart your Galaxy
Looked at mobile device fixes.
Lost P3 100% gone
Reinstall the app, on a android you can go in and remove all files related to DJI app, to get a fresh install.
Try another mobile device.
"it keeps saying DJI go stopped" this is when you are downloading the firmware from DJI, or trying to install the firmware to the Phantom?
Rod
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P2V+ , P3S , P3A(2), P4, MM1, Marco Polo, Litchi with VLM!
Phantoms just don't fall out of the sky, the RTH is set to china. (Rod)
P3S => Fly-it or Fryware-it (Rod)