Hi @Saemon32, let me see if I can help out here!
Your post has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
There is no way to increase the maximum level of volume in the phone using the device settings. There may be apps available in Play Store capable of doing so, but it is not anything that i would recommend due to the fact that it may damage the speakers in the phone.
I hope that answered your question. Let me know if I have misinterpreted your question in any way!
