Can I save/backup my SMS text to my SIM on iPhone 4S?
Is it possible to save my SMS text message to my SIM in my iPhone 4S?
iPhone 4S, iOS 6.1.1
No you can not, but if you do an iCloud backup it will save your text message history.
Make sure you are connected to wi-fi, then Settings>iCloud>Storage&Backup>Back Up Now