Hello 
I bought a phone from a friend. After 5 hours using the phone , I noticed that in the background of the screen you will see apps that have been used previously.
For example, when I write with someone , then locks the screen and then enter the code you see in the background the keyboard from the previous action. I don't have any idea what's wrong with my phone. I tried to repair this by iTunes (by reset without restoring a backup) but unfortunately the problem did not disappear. I enclose photos.
Sorry for my lame language
Hope you will understand what I mean, and you know what's wrong
I bought a phone from a friend. After 5 hours using the phone , I noticed that in the background of the screen you will see apps that have been used previously.
For example, when I write with someone , then locks the screen and then enter the code you see in the background the keyboard from the previous action. I don't have any idea what's wrong with my phone. I tried to repair this by iTunes (by reset without restoring a backup) but unfortunately the problem did not disappear. I enclose photos.
Sorry for my lame language
Hope you will understand what I mean, and you know what's wrong