The citric acid makes the sodium bicarbonate more soluble in water. Old chemistry trick, still used in a lot of detergents. Alka-Selter works because it contains aspirin imho. Citric acid is also used in cheesemaking.
About Visual Voicemail. Visual Voicemail is a free1 service that allows you to listen to your voicemail messages in any order you choose from an email-like inbox. You can easily play and delete messages, make callbacks, and manage voicemail features. Use your smartphone Ã¢ you canÃ¢t set up voicemail from another phone. Have a data plan with Visual Voicemail.1. Most AT&T Unlimited PlusSM, AT&T Unlimited ChoiceSM, and Mobile Share AdvantageSM or Mobile ShareÂ® smartphone plans include Visual Voicemail. Learn how to compare and change your plan.
AT&T Voicemail Viewer makes it easier to stay on top of your voice messages and fax messages (if available) wherever you go. You can choose from several smartphone applications and web widgets or gadgets to access your AT&T Voicemail Viewer. To read specific instructions for installing and using AT&T Voicemail Viewer widgets, gadgets, and smartphone applications, choose your preferred access method below.