@Mikica wrote:
I have z3, and have recently deleted used space within the app (radio) and today I've reseted the phone... The problem is that the appearance of the app is no longer the same, when I turn it on. Now, it's just black and it used to have colourful star background when I let the music play. I soooo loved it before, pleeeease can anyone tell me how to get it back. Ty
Without root you couldn't delete Radio app from smartphone, how do you did that? 
Try repair your smartphone with Xperia Companion
I did not delete the app, I cleared the cash data and the feature is now gone. Do U have sony z3? When U turn the radio on, tgere's that star background, changing colours. I do not have that anymore, it's just black 
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