If you sound too relaxed or overly familiar, you're going to undermine both your and your company's credibility. People want to buy from an expert — not someone trying too hard to sound cool. So avoid coming off as too laid back and using too much slang, "um's," and "yeah's."
And also don’t forget to write down your message just in case you get too anxious and forget to say your name at the end of the message.

No…..,mailbox full, means mailbox is full. The person has decided not to check or between deletions, her voice calls /voicemails have become full again.. You have to remember some voice boxes are small and only can hold three voicemails, irregardless, no, you are not blocked. Open your device’s Phone app ​. At the top right, tap More . Tap Settings. Voicemail. You can: Change what handles your voicemails: Tap Advanced Service. Set up your voice mailbox: Tap Advanced Setup. Change your notification settings: Tap Notifications. How many messages until voicemail is full?
Yes, you can make an email personalized, too. But voicemail is already much more personal than an email, and your level of customization should rise to meet that. Plus, if you’ve spoken with the contact in the past, there’s an even bigger opportunity to build on what you already know and cater the message to them.