One of the more frustrating things about iPhone 3.0 is that a couple of its best new features—namely MMS and tethering—aren’t available to AT&T users. As it turns out, you can trick your phone into turning on both features.

Gizmodo points out a secret method for enabling tethering and another for switching on MMS. Before you follow either of these, remember that these are unsanctioned hacks, so you may or may not be thumbing your nose at AT&T and, more importantly, asking for trouble down the road. Still, if tethering and MMS are monumentally important to you and you can’t wait until this summer, one of these methods could work for you. Just be informed and careful.

The tethering method from Aaron Krill involves spoofing AT&T into thinking you’re using a different phone (any phone other than the iPhone), and in a nutshell looks like this:

• Enable IPCC updates on iTunes 8.2
• Update IPCC files
• Spoof AT&T’s website into thinking you have another phone

To enable MMS using the method provided by Krill requires that you have another GSM or (better yet) AT&T phone on hand.

Read more on his blog here (site referred via Gizmodo): http://www.krillr.com/blog/3DPQHBZ3/i-have-tethering-and-mms-on-my-iphone-and-yes-im-on-att