yes, Dante, I had great success with DroneDeploy and my Phantom 3 S. plus Samsung smart phone. Twice ! ! That's all.
Then there was a firmware upgrade and DD began failing to activate the drone camera during the autopilot flight mission. So I started a forum thread here called Camera Fail and you can find that thread and see that other people have had the same problem. Often it is with Android devices but not so much iOS -Apple.
I will tell you that I am now told that DJI is not playing nice with 3rd party developers who are writing code for older DJI drones and maybe it will take awhile to fix these problems.
My camera then went crazy and failed totally so I sent the quad to DJI to fix it.. Waiting for the return; not flying dji drones or DD right now.
I do not know how far the flight lines can be from your home point. If you choose a large area then maybe the lines can be very long. My controller was not good but that did not seem to matter to DD, the drone autopilot flew a good long ways away from homepoint and seemed to be in control.
I do not think my drone lost signal from RC but I do think it would end mission and return to home automatically if signal was lost; like if you go indoors during flight and the obstructions prevent RC contact. Drone comes back on its own. I did hit the home or house icon during flights to force RTH to make certain that this command did work. Every time.
I am not certain if the mission is in the cell/tab or drone. I do not know if the drone has a hard drive to store the mission. If you shut off the RC , during flight, will the mission continue? I know not.
This is the best I can do regarding DD. I had a very short time to use it before failure. I will attempt to use it more when it is fixed or when I buy iOS cell phone.
Best of luck