How to 

Sending a voice message is a more convenient option when compared to a text message. Here is how you can send a voice message on an iPhone with the latest iOS version. 

Step 1: Open the Messages app.

Step 2: Tap the + (Plus) icon.

Step 3: Tap on Audio. Recording begins immediately after you tap it.

Step 4: Speak into the microphone to record your message.

Step 5: Tap the Stop button when you’ve finished speaking.

Step 6: After recording, you can either replay the recorded message or send it to the recipient.