I am using S9.In recently every every activities bixby UI screen will pop-up. . Now with is I am getting ⚫ ◼ screen.I need to format the mobile  .

I am using S10 plus,When I am using map on s10 plus, the map navigation will minimize after 1 min.Also while typing messages the messages screen will minimize or it goes to down

I can receive the files using wifi direct, butI cannot send the photo from gallery using wifidirect for S20 plus.Is this expected behavior

I am looking to buy note 10 plus refurbished one. Is it safe to purchase Samsung refurbished phones?

I was planning to purchase S20 plus , s20 FE,All review says battery issues or getting more heat. Is it due to exynos chipset or it due to immature code?Or Samsung quality team not see the battery /heat issue and sell the phone.