I can not record voice message in imessage on my iphone

When using the Voice Message feature on an iPhone, the microphone icon is specifically designed to be activated only for iMessage conversations and not for traditional SMS/MMS messages. This functionality is tied to the distinction between iMessage and SMS/MMS protocols.

When composing a message, whether it's a new conversation or a reply, the recipient's contact information plays a crucial role in determining how the message is sent. If you enter a phone number or Apple ID in the "To:" field that corresponds to an iMessage-registered recipient (someone using an Apple device), the microphone icon becomes active.

The activation of the microphone icon signifies that you can now send a Voice Message, which allows you to record and send an audio message instead of typing out text. By tapping and holding the microphone icon, you can start recording your voice message, and releasing the icon will send the recorded audio to the recipient.

On the other hand, if you enter a phone number or Apple ID in the "To:" field that is not registered for iMessage (non-Apple device user or someone with iMessage disabled), the microphone icon will remain inactive, and you will not be able to send Voice Messages.

This differentiation ensures that Voice Messages are sent through the data-based iMessage platform, providing higher quality and more features, while traditional SMS/MMS messages are limited to text and multimedia content without the voice recording capability.

It's important to note that both the sender and the recipient need to have a compatible device and an active internet connection for iMessage to function properly and for the microphone icon to activate.