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После ращблокировки экрана, вверху появляется надпись :ошибка чтения NFS. Повтор попытки. С чем она связана? Кто-то сталкивался? Что сделать можно
After the screen is locked, the upper part reads: an error reading NFS. Retrying the attempt. What is it connected with? Someone faced? What can be done?
-GT
This is a international community and your previous post has been translated in to English. Please keep all future posts in English so that other users may more easily understand you. 
It sounds like you have a NFC tag near your device that it is trying to read. I recommend that you turn NFC off and see if you still receive the same error message. You can do this if you go to: Settings > More > NFC > Off.
Let me know how it goes! 