Rehearse or write down your message before recording it. Remember that old saying “practice makes perfect?” It’s certainly true when it comes to creating an electronic greeting. The more you’ve rehearsed, the easier the message will be to restate. If you don’t have time to practice, writing down the greeting before recording it – and then reading it aloud from the paper – may help you stay focused on the correct wording.
It's important to mention your follow-up plans in your sales voicemails. Sometimes just the knowledge that you'll call again is enough to entice a prospect to respond. Let them know that if you don't hear back from them, you'll follow up in a few days or next week.

3. Mobile Wireless: Press and hold the “1” button on the dialer screen of your T-Mobile device. This command automatically dials into the T-Mobile voicemail system.
Repeat your phone number twice. People seem to forget that the receiver of their message has to write the number as you say it. Don’t rush through it. Even when you say it slowly, it’s hard to get down the first time. So repeat it again, so they can check to be sure they got it down right.