The non-availability of tethering and MMS features in the U.S at the time of the launch of iPhone OS 3.0 was probably the most disappointing news that was announced at the WWDC 2009 Keynote address.

Some folks had figured out a simple hack to enable tethering on iPhone OS 3.0 without the need to jailbreak their iPhone.

In case you didn’t know, Aaron Krill over at Krillr.com has also figured out a way to enable MMS on iPhone OS 3.0.

Before you start, you need the following things:

• Modified version of ATT_US.ipcc which can be download from this link.

• iPhone running iPhone OS 3.0

• iTunes 8.2

• Another AT&T Phone (not an iPhone)

You then need to enable IPCC updates for iTunes 8.2 and copy the IPCC file to your iPhone. To achieve this, you need to follow these instructions:

Enabling IPCC Updates for iTunes 8.2:

iTunes 8.2 will not allow you to apply the IPCC updates so you need to follow these steps:

MAC OS X:

1. Close iTunes.
2. Open Terminal (Applications > Utilities > Terminal).
3. Run the command: defaults write com.apple.iTunes carrier-testing -bool TRUE.

Windows 32 Bit:

1. Close iTunes.
2. Go to Start then Run and type CMD.
3. Run this command (If you right-click on the cmd window you can paste): “C:Program FilesiTunesiTunes.exe” /setPrefInt carrier-testing 1.

Windows 64 Bit:

1. Close iTunes.
2. Go to Start then Run and type CMD.
3. Run this command (If you right-click on the cmd window you can paste): “C:Program Files (x86)iTunesiTunes.exe” /setPrefInt carrier-testing 1.

Copying the IPCC file to your iPhone:

The above steps will allow you to update the IPCC using iTunes 8.2. To copy the IPCC file to your iPhone follow these instructions:

1. Open iTunes & plug in your phone.
2. Click on your phone in iTunes (under device settings).
3. Windows Users: hold shift and click “Check for updates”. MAC OS X: hold alt and click “Check for updates”.
4. Select the IPCC you downloaded earlier.

This is where your other AT&T phone comes in handy. You need to follow these steps to enable MMS on your iPhone:

1. Remove the sim cards from both the iPhone and your non-Apple phone
2. Place the iPhone sim card into the non-Apple phone
3. Power on the new phone
4. Make a phone call or two (your voicemail works)
5. Log in to your myWireless account at wireless.att.com
6. It should now say that your device is whatever you put your SIM into. If it doesn’t, repeat step 4 a few times.
7. Go to the “Features” tab
8. Select a “Messaging Plan”, one that isn’t an iPhone plan.
9. Click next and go through all the legal crap
10. You should now have MMS enabled on your account.
11. Swap the iPhone sim card back into the iPhone.
12. Reboot the iPhone.

Note:

• AT&T Family Plan users who have a family messaging plan can skip steps 7-11.
• Please don’t add an iPhone texting plan back to your account, as it will disable MMS again.
• Aaron has reported that AT&T may be blocking these steps from immediately taking effect so he has adviced users to call AT&T after step 10/11 and before step 12 to complain that MMS isn’t working. According to him this should fix the issue.

There are some complaints that visual voicemail stops working with IPCC updates, so like all hacks, please proceed with caution and remember that you run the risk of voiding your iPhone’s warranty.

But if you plan to still give it a shot, don’t forget to tell us how it goes in the comments section.

[via Krillr.com]