Thanks for the quick response. This is quite frustrating as I'm pretty savvy when it comes to things like this. I did as you said, there are other options for the message, but only one option to delete. I've looked at all the phone settings, found memory manager, there is an option to clear all from handset memory, but no option to clear SIM card memory....
As well, I've deleted all inbox and outbox messages, but I still see that 30 texts are saved to my SIM, so obviously that was automatic.....I don't know......