A:AnswerNo its not necessary, we just have one in the drone itself which is better quality photos and video. You can put one in both in case you lose the drone, you still have whats saved to the remote.
A:AnswerCell phone service is not required the drone can fly with out wi-fi/service I recommend getting a sd card for your controller and offline download the map of where you are going to have more information.
A:AnswerFor the mini 3 there is no obstacle avoidance but the pro does and max wind speed is 24 mph for mini 3 and for the pro it is the same but if you use the intelligence battery you have take bigger winds because it makes the drone heavier
