Tap the Message+ icon .
If not available, navigate: Apps > Message+.
Tap the New message icon (located at the bottom).
From the To field, enter a 10-digit mobile number.
As the number is entered, a matching contact may appear and can be selected at any time.
Alternately, tap the contacts icon (located on the right-side of the To field), select a contact, select the appropriate mobile number then tap OK.
Repeat this step as necessary to add additional recipients.
If prompted, select an option:
Allows recipients to reply to all who receive the message.
Doesn't allow recipients to reply to all who receive the message.
From the Type a Message box, enter a message.
To add an attachment, tap the Add icon + (located to the left of the message box).
From the attachment section located below the message box, tap Audio.
Icons may appear different between Android and Windows devices.
If presented with "Complete action using" options, tap an option.
Select an audio file then tap Done.
The audio file is sent automatically.
For additional attachment options, refer to Send a Message (begin with step 5).
For additional info on Verizon Messages (Message+), check out these FAQs.