Don't think for a minute that you are limited to sending voice mail to regular landline phones. In fact, maintaining databases of cell phone numbers as a contact's primary touchpoint is becoming ubiquitous.
For example, we at OrangePoint.net recently sent out a voice message to a college age group. Most of those were cell phone numbers, and yes, the message was delivered to both live answers and to wireless voice mail. Recipients could pick up those messages at their convenience.
To enhance your business with your customers, members, students or constituents, with phone broadcasting, it's always important to remember some fundamental things about wireless or mobile technology. Wireless may not mean "all access", but wireless capacity means a handheld mobile device may have the capability of being in sync with a desktop PC, exchange server, wireless Internet and network, although the functionality can differ between mobile models.
Not every handheld has mobile synchronizing capability. That means you may have to wait until you're at an office PC. While this can hamper on-demand capabilities, it can also limit possible frustrations. If the time outside the office is brief and unsteady, then this can be a viable strategy. Otherwise, you may desire to see if the mobile device has traditional HotSync and wireless capability. It's vital for you to remain energized and be efficient. Power management is a factor that's most important in the success of handheld devices.
Most users of handheld devices don't realize that WEP access, synchronization functions, Bluetooth and other handheld device activities are serious battery drains. Thus, it's important to be efficient and attempt not to have too many demands for the handheld device. This procedure can extend the battery life and offer more time per battery charge. If you're a consistent handheld user, then it's wise to invest in extended life battery or an additional battery.
Be courteous to limit possible frustrations for you and colleagues. Handheld devices have small screens, memory and keyboards; thus, common sense will certainly apply. The next time you're inclined to send an text to another person's handheld device and want the person to read it, remember to consider what you'd do if you received that same message.