How to resolve WhatsApp calling and voice message is not working in my phone

Hello safeer241,

Thanks for asking the Apple Support Communities about issue with recording using your iPhone. We're happy to help.

First, start with the steps provided, to see if they help.

Next, check if this is a microphone issue, or an app issue: If the microphones on your iPhone, iPad, and iPod touch aren't working - Apple Support

If your microphones only do not work in WhatsApp, please contact the app manufacturer: How to contact an app developer - Apple Support

If your microphones also do not work in Apple apps, you will need the device repaired. Please review this help article and make a recent backup prior to sending your device to get repaired: Get your iPhone, iPad, or iPod touch ready for service - Apple Support

Log in to iCloud to turn off Find My: Turn off Find My on your iPhone, iPad, or iPod touch - Apple Support

Thanks and have a wonderful day.