iPhone 3Gs/ 2G Visual Voicemail : set up step by step guide

iPhone 3Gs/ 2G Visual Voicemail : set up step by step guide
* this guide original from Apple
For  iPhone 3Gs/ 2G : Set Up/ change Voicemail number HERE
Summary
When you decline or don’t answer a call, the caller hears a recorded greeting and can leave a voicemail message. On iPhone, visual voicemail lets you see a list [...]