Hi Thoma(s), let's give it a try to help you. But I need some additional information for that. Do you mean the antenna on the drone or the antenna on the remote control?
So that sounds interesting. You do the same job as a user @nikonorovv did on a Russian website:
P3SE: fly at a maximum height of 2000 meters.
That seems like we have a real expert with you in our midst.
You want to know what you can do to fly higher than 500 meters. Well, the solution is already mentioned in the opening post.
What is wrong with reading a complete topic where you will find all the information?
Why do you make a password public? If the poster (@chatikib) wanted it, he published it himself. What you do with this kind of nonsensical actions is that new modified apps will not being posted.
I also see in your further messages that you only talk nonsense. If you have nothing to say, it is...
Have you installed an Argtek antenna on your Phantom 3 SE? Then I am very curious about your experience. Share your experience and let it me know in this topic.
I doubt to buy an Argtek antenna for my Panthom 3 SE.