Loudspeaker turns on automatically during a call in mi,redmi,4,note.5.3.4A,android phone hindi HD

Hi Please go to setting - installed app - phone - clear data and cache. second splution Go to settings -then About phone -then Kernel version (tap on it until it opens up). You can find hardware tests. First one is for Speaker calibration. Calibrate it and boom ! your problem is solved third solution just go to SETTING then ABOUT PHONE then SYSTEM UPDATE GO TO MENU OPTION then REBOOT TO RECOVERY MODE then REBOOT NOW Mobile restart and go to the RECOVERY MODE. THERE ARE 3 OPTION 1. REBOOT 2. WIPE DATA 3. CONNECT WITH MI ASSISTANT CHOOSE 2ND OPTION USING VOLUME DOWN KEY THEN FOR SELECT OK USING POWER BUTTON MOBILE REPAIR AND RESET ITSELF. BEFORE USING THIS METHOD PLEASE BACKUP AND SYNC YOUR PERSONAL DATA. ITS REALLY WORK ON USING REDMI AFTER MIUI 9.5.1.0 UPDATE.