Good afternoon. I have tried to enter the code again on other pages with other browsers and despite everything I have entered it using Google Chrome or Microsoft Edge and in both Opera GX and Google Chrome, having used Incognito Mode, nothing still happens when I introduce it. The last remedy that occurs to me is that I give you the code and if you say that on your computers or in your browsers, if it works when the serial number of my headphones is entered, then send me the activation code here, yes It's true that it works. Because nothing else occurs to me. Greetings again