Your AT&T VoiceMail Service access number is: 1-888-288-8893. When calling from home, if prompted, enter your password followed by #. If you are not calling from home, you will be prompted to enter your 10-digit telephone number followed by your password, then just follow the system prompts. From any Home screen, tap Phone. Touch and hold 1 or dial 123 and tap Call, or tap the Voicemail icon to call voicemail.
Go to your phone Settings and open Cellular option. Now tap on the toggle for Cellular Data option. Turning on the Cellular data; Try using your voicemail and see if the problem still exists. Method 3: Setup Your Visual Voicemail. If you are unable to set up your voicemail through phone settings, then you can try setting it up through your carrier.

What kind of company do you run? A law firm may prefer more formal business voicemail greetings than a trendy retail store, for example.
Professional voicemails are important, because they’re an extension of your personal brand, reflecting what level of professionalism you offer. Use these voicemail greetings for work or personal cell phone messages for your specific needs. You can choose a voice that will best suit your business and will deliver a warm and professional voice message. Your callers don’t want to hear a cold and indifferent machine voice. The information you want to put in your voicemail should be succinct enough for your callers to get every bit of information they need. Leave the relevant information in a clear and precise manner. Professional voicemail greetings for work should be informative. The first message the customer hears should have the company’s name so they can be sure they’ve reached the right number. Be courteous and informative. This could be their first point of contact, and you want it to be enjoyable. You may also like 30 Best Wishes and Congratulations for New Business Adventures If you’re going to make your voicemail message humorous in some way, it should be tasteful and aligned to your brand. It shouldn’t get in the way of giving customers enough information when they call. Your voicemail greetings for work should be welcoming and friendly but not too informal. Customers want to feel confident that they’ve contacted a professional, that the company values their call, and they have made the right choice. So be friendly but not too nonchalant. Your voicemail greeting should be clear, concise and to-the-point. You don’t have to put your clients through a sales pitch when they are trying to just get some information.