After receiving my typhoon h, I refused to even give it a spin until I made sure and read the manual several times and read multiple discussions on this forum. I didn't want to be guilty of making a simple error due to missing some important information (like not using the red button on the TX for auto landing... I am sure that I could have made the same mistake) I read all of the requirements for the compass calibration (open field, no power lines, concrete structures nor cell phones) and so made a special trip across town to a park that had a large open field with no power lines, concrete nor metal core structures. I made all of the calibrations and afterward flew it for about 10 mins, just to break in the battery. After I got home I realized that I had my cell phone in my pocket the whole time. My questions is: is it necessary for me to recalibrate the drone since I had my cell phone in my pocket? The calibration was successful and the drone has flown fine on both of my outings, but I have had a hard time making it back out to the open field. I typically fly it in my neighborhood which has a ton of power lines and no open fields. I generally have flown build from scratch drones and hooked up my own flight controllers and gps', but have never followed any of the yuneec criteria for calibration and haven't had a problem. But, if there is a chance that I got a lemon, I want to make sure that I go by the book, that way I can be sure to be protected by the yuneec warranty. I guess basically I am asking that: if the calibration shows that it was successful, do I need to recalibrate if I didn't follow procedure? Thanks!