I have firmware 8667Q军灿UI02-国外-1280x720_v28_20230302, I don't play root anymore, I don't test anything, there are pluses but there are also minuses, sometimes something stops working when I kick too hard. I prefer a working radio than constant repairs because something does not work because I play too hard on the radio. I have a friend who fixes radios, I'd rather ask him for magisk. I did everything under myself, tts voices are good, I turned off duraspeed, applications are not put to sleep thanks to this, tts voices from google are heard well. This is something strange with TTS voices, the same software after reset or factory settings is different, half and half can be heard well or not, there is no rule.