Your png file looks good, it's transparent, but I noticed that it's 16 bits a channel. Maybe iPhones are not designed to handle that, I don't know. Try mine at 8 bits a channeltnx 4 the replay Chambone, i did as u said but something not working
when i check the file in web browser it does has the transparent effect,
but when i check it in different picture viewer software i get a white image
and if i place it in my iPhone it gives me a black background, what am i doing wrong ?
P.S. i attached the file i made and a screen shot of what i get on my phone:
View attachment 340616
View attachment 340617