@LupusE Thank you very much for your reply. I created a topic Custom firmware build Mudi GL-E750 but the developers do not help, I don’t understand why)) If they asked me, I would know the answer, I would gladly help. I would write in detail how to do it. I do not understand what the problem is to tell the user (that is, me) how to build custom rom. Moreover, I bought their device for 200$. Why then a forum if the developers can not help))