I did already see that the Google contacts issue is the same as on ours.Thank you for Help my friend, I will try now. I don't Have a Joying head unit, it's a Ullgo head unit with fytmanufacturer = 108
I will get back to you quickly with specific details, link and all informations i can give you. I have test many sort of firmware on this forum but translation is very difficult on russian forum : https://4pda.ru/forum/index.php?showtopic=936715. This russian forum is a big library for mod our SC9853 head unit !
But I will test the best and after i will get back
Sorry if my english is bad. I'm French