Any suggestion to syce my iPhone sms backup to PC and keep

I once come across the problem that my iPhone rejects receiving new SMS but all the SMS are so important that I don't want to delete them. So I simply need to backup your iPhone SMS onto computer or print them or transfer to another iPhone?
Here I am looking for a way on how to transfer your SMS from iPhone to computer and keep them in safe.
I'm desperate any help would be appreciated...