by Calvin Robinson on May 13, 2009.

Get MMS and Tethering running on your iPhone:

So iPhone OS 3.0 Beta 5 is out … but before you go and upgrade, you may want to read on. MMS and Tethering are built into the current betas of OS 3.0, and we have discovered how to access them.Sporkings, May 2009

Checkout the whole article.