I noticed on my friends phone that his text message icon says SMS and then text underneith it. Mine just has the conversation bubble with "messages" underneith it......any reason why ours are different?
You've got 3.x software...your friend is still running 2 point something.
He couldnt have updated , once you jumped to 3.xxx , it changed because of the MMS capability that we still have to wait for next friday ,
When anyone with an IPhone upgrades from 2.x firmware to 3.x the icon for messages changes from SMS to Messages. In 2.x only SMS was available, with 3.x MMS is now available so it switched from SMS to Messages because it now does more than just SMS. So you're friend didn't update or his would say Messages instead of SMS.