Hello Majid_Sayed.As this situation will be faced by every customer who uses the smartphones.Because the product owner (samsung and others)will provide the guaranteed certain period of software updates and after that you couldn't receive the updates....

Hello dr_abhijeetsingh.Samsung has recently avoid the S Secure from all upcoming devices. So your device will not support to S Secure further. But instead you can use Secure Folder. I hope you understand. Thank you.

Dear kazi_rayhan.Let me know,whether you face a issue during the calls.If there is issue kindly please contact to authenticated samsung service center immediately. Thank you.

Hello kazi_rayhan.May I know does your microphones works while during a call.If it works then you can check whether you have allowed the microphone permission for the app. I hope you understand. Thank you.

Hello Saket12.Kindly please restart your device once and check. If this repeats kindly contact to authenticated samsung service center immediately. Thank you.