I recently jailbroke my iPhone 3G using redsnow 0.7.1 and then 0.7.2 and after both jail breaks I haven't been able to use Visual Voicemail. After multiple attempts on both I used two websites that setup the data for me, including teathering. The second site I used setup the tethering and it works well. It's also supposed to setup MMS but I haven't had a chance to try it yet though. I've read several threads and tutorials on many sites including this one, and most say to do this(taken from another thread here): Check the APN for the visual voicemail: Under Settings > General > Network > Cellular Data Network Unfortunately I haven't had the Cellular Data Network option at any point yet. I've added a picture to show the options I do have: Please Register or Log in to view images The only other option which is slightly visible, is that for WiFi once I get into the network category. If there is another site that can do this for me, or something I can do manually? Important info: iPhone 3G Firmware 3.0 Most recent jailbreak tool: redsnow 0.7.2 Using AT&T In the United States Data Works Internet Tethering Works MMS is said to work but remains untested. Thanks for the help. I've found this site very useful for both my iPhone and iPod Touch.