I am not aware of any method to retrieve a deleted text message, even on phones with a SIM card. Cell phones generally do not save text messages on a SIM due to their limited memory capacity. You might be thinking about removable micro or mini SD card. I wish you luck, but don't think you can retrieve the deleted messages.
If I'm annoyed and you're annoyed, does that make us a paranoid ??
Sarcasm is a fine art...
"Don't believe everything you think"
It's not a matter of if you win or lose, it's how you assign the blame