The OTG cable from eBay was the key to finally getting the Spark, Controller, and iPhone 12 Pro Max on the same page. I received a 'Precise Fly Database Update', 'New Firmware Update', and 'Weak Default Password' messages, which I will work through. But got the all important 'Connected' message. The 'Wifi Settings' in the DJI Go 4 app also popped up. I received IMU & Compass warnings also. But my friend who gave me the Spark lives many miles away and I tested the Spark on my desktop... not outdoors. I spun the props on my desktop for a minute or so and shut it down. I found the YouTube video below by 'FlyPath' to be very helpful on the use of the OTG cable. Again many thanks to the subject matter experts on the forum for the OTG recommendation.