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.
If your carrier supports Visual Voicemail, you can set it up with these steps: 1  Go to the Phone app, then tap the Voicemail tab. 2  Tap Set Up Now. 3  Create a voicemail password, then tap Done.  Enter your password again to confirm it, then tap 1  Done. Select Custom or Default. If you choose Custom, you can record a new greeting.