If you’re recording your voicemail greeting during a busy time of the day and there’s a ton of background noise, there’s a chance it might interfere with the call-to-action you want your customer to perform. If you’re not speaking directly into the phone and your voice is breaking up, put the phone closer to your mouth, speak slowly, and read from a script if necessary.
If there are changes to the device's SIM state (ACTION_SIM_STATE_CHANGED) or Carrier Config values (ACTION_CARRIER_CONFIG_CHANGED), and a valid configuration for the given SIM no longer exists, then the voicemail source is unregistered locally and the voicemail tab disappears. If the SIM is replaced, VVM will be re-enabled.

A Professional Greeting Can Make a Big Impact. Increase Customer Satisfaction. Leave a good impression on both your prospects and existing customers. First-time callers may be in the process of deciding whether or not to do business with you, while existing customers may be looking to solve an issue. Create a pleasant, yet brief recorded
For those with voicemail greetings that get changed about as often as a new president is elected, know that this is doing a serious disservice to the caller-recipient relationship. It signals to callers that the business is anything but an authority, most likely not very detail oriented, and has questionable overall credibility and competency. Those aren’t traits that any business wants to associate itself.