To activate your new AT&T Voicemail Service by dialing your telephone number from the phone assigned with the feature, follow these steps: Dial your 10-digit telephone number and press * while the greeting message is playing. Create a passcode. Record your name. Record your personal greeting. Record your busy greeting. Enter *VM (*86). Tap the Call button. Follow the setup tutorial, which will walk you through selecting a password and recording both a voice signature and greeting for your voice mailbox. Note: If you hear your own or a system greeting, you’ve already set up your voicemail. From the Home screen, tap the Phone Key in the Quick Keys bar. (The Phone application can also be accessed from the Applications screen.) Dial *86 or press and hold to dial your voice mailbox. Follow the setup tutorial. Enter a password. Record a voice signature and greetings for your voice mailbox. Call your Straight Talk phone from a landline phone. When your voicemail begins, press “*” (star key) on your landline phone immediately. Enter the PIN you use to check your Voice Mail from your Straight Talk phone. Listen to the instructions.
6. You have reached [your business]. All of our representatives are currently busy, but if you leave us a detailed message with your name and number we will return your call in the next two hours. Thank you for calling and have a great day.

Create a clear, concise outgoing message for your answering machine. Tell the caller exactly what information you expect so you can easily return the call. For example, you could say, “Please leave your name, number, and the time you called.”
Some answering machines allow you to customize the length permitted for individual messages. This is convenient because you can shorten the time for each message if you know you’ll be gone for a very long time.