Xiaomi review: Mobile phone

The area that I follow in Egypt... The problem in particular is the high volume of the caller's voice from the speakerphone so that his voice is audible to all those around me even though the loudspeaker is not turned on... And the second problem is with the proximity sensor as I when I put the phone to my ear to talk, the screen opens, and when I call someone, the screen turns off and I need to move the phone vigorously so that the screen works again... These are all problems in the manufacture of the phone and not an individual problem, this problem is faced by all users of Xiaomi phones and I know this by communicating with customers on social networking sites... The phone did not complete with me for 3 months, and I bought it for a large amount... And these problems in the phone made the experience of using the phone bad... I repeat my request for a refund that I paid on the phone or send me a new device