Hi. I'm an old DJI guy (stoneage Naza M2 homebuilder), but just stepping into the world of RC contollers linked into a Smartphone or tablet via DJIGo4. Put up the Mav Pro today, and my Go4 app crashed twice in one flight. I'm running a Samsung Galaxy S9. Latest Android Update, as well as latest Go4 and aircraft firmware. Very capable cpu, ram, etc on the new Galaxy....I also kill any apps and use Airplane Mode while flying. I'm wondering if had better consider a DEDICATED Apple product (Ipad Mini 4?) before I lose a bird.... ? My Spark also crashes with this phone. I run the OTG cable with both birds... No WiFi. Any wisdom? I suppose I could re-read the side of the Mavic and Spark boxes.... " This product is optimized for use with Apple Products..." I understand that lots of folks use the Nvidia Shield with great success. I think I need something other than a multitasking smartphone to safely fly. I may be forced to buy some Apple product, despite the fact that the Mini 4 is discontinued. Any help is appreciated. Ron