I am trying to see which works as advertised, meaning no additional hacking or fixing. Please be honest. From 9to5mac.com http://www.9to5mac.com/iPhone-3G-tethering iPhone 3.0 is live! so we are going to repost our tethering tutorial with some big improvements. You now don't have to do any downgrading or torrenting. Seems you can just run a little command in terminal (Make sure you are on OS 3.0 on a 3G iPhone and iTunes 8.2): defaults write com.apple.iTunes carrier-testing -bool TRUE After that, the steps become a lot more simple. 1. Download this file (for AT&T) and mount the disk image (thanks Gizmodo) for other carriers, try here. 2. Option-click on "restore" in your iTunes with your iPhone attached. Browse to the opened disk image file and hit OK. It will update phone settings for a few seconds. 3. You have tethering. Now go into your iPhone/settings/general/network/Internet Tethering and turn it on. Boom - 3 steps to tethering... Oh, and how to you like cut and paste and spotlight search? Originally Posted by Darknight16 http://forums.macrumors.com/showthread.php?t=723606 1) Download file 2) Remove .txt extension 3) E-mail the file to whatever e-mail you read on your iphone 4) Open mail and click on attached file to install 5) Ignore warning that pops up Originally Posted by zilian77 http://forums.macrumors.com/showthread.php?t=723606 1) download the file attached here and e-mail to yourself, open in mail on iPhone. 2) go to http://9to5mac.com/iPhone-3G-tethering and follow their instructions to get tethering on. **When you do step 2 "Cellular Data Network" menu appears under "settings" > "general" > "network" **MMS is not working for me but the icon does show up and you can select pictures but you get an error when sending... (look a past post pic attachment) 3) when "Cellular Data Network" menu appears go to it and type this info there, U.S.A AT&T APN: wap.cingular User: firstname.lastname@example.org Pw: CINGULAR1 MMSC: mmsc.cingular.com Proxy: 18.104.22.168 **your VV will not work so I followed the advice from one of the comments on http://9to5mac.com/iPhone-3G-tethering "EASY VOICEMAIL FIX! (restores original carrier settings) Wed, 06/17/2009 - 11:29 ben (not verified) 0 points Ok heres how you fix your voice mail- 1. Connect the phone to itunes and option click restore 2. Navigate to your user name->Library->iTunes->iPhone Carrier Support 3. Select the file contained within "iPhone Carrier Support" and proceed You now have your voicemail working again" 6) took out sim and put it back in while restarting the phone. Theese Instructions are AT&T only! and is what worked for me. The file he refers to is attached to this message (Thanks again, zilian77). Note: If you don't understand any of this, chances are you probably shouldn't be doing it. And I reiterate, MMS IS NOT WORKING. We have yet to figure this out. If anyone does get to to definitively work, post here and I'll update this top post. So far we have gotten the camera icon to show up on the Messages.app.