Finally, AT&T’s long-awaited MMS update for the iPhone is finally ready. Just plug your iPhone into iTunes and hit the “Check for Update” button.

You should get the dialog message above, saying: “An update to your carrier settings for your iPhone is available. Would you like to download it now?”

Hit “Download and Update” and wait a few seconds, then go to your iPhone and launch the Messages app. There should be a little camera icon to the left of the text input box at the bottom. Hit it, and you’ll be able to send pictures or video with your text messages.

Some users are reporting they have to manually reboot their iPhone after installing the carrier update.

PS: Haven’t tested if this has any effect on the tethering profile update