We cannot promise the exact time frame at the moment but we are looking at Q4 2016 to add a lot more features as well as improving our coverage map with more ground. At the moment our primary target is to improve our coverage.
After creating, the Voicemail Greeting, you can test it by calling to your number from another phone, and see if it is playing correctly or not. Open the Phone App. On the lower screen, tap on the Voicemail option. Select Custom, with this option, you can record the personal voicemail greeting on the iPhone. Tap Record, to start recording the voicemail greeting message on the iPhone. Greeting samples are given in this article below, Once you are done with recording, tap Play to listen. Lastly, if everything is alright, and custom voicemail recording is perfect, then tap Save.

A word of warning: These greetings will not do you any favors if you're in the midst of a job hunt or work in a conservative industry. Always remember your target personas. If there's a chance they won't appreciate your sense of humor, opt for a straightforward greeting instead.
And remember, while you’re busy returning your calls, Blitz can be automating other parts of your sales process. We can assign leads to your staff or even send emails to your customers.