Q: I received an invalid simm error after upgrading to iOS 7 now I cannot save content?  Anyone have an answer?

Hello gisman10151,

Thanks for using Apple Support Communities.

For more information on this, take a look at:

iPhone: Troubleshooting No SIM

http://support.apple.com/kb/TS4148

1. Toggle Airplane mode On and Off.
2. Try turning iPhone off and then on again.
3. Check for a carrier settings update. Tap Settings > General > About. If an update is available, a prompt will appear.
4. Remove the SIM Card and verify that it is a valid, carrier-manufactured SIM. Also verify that it is not damaged, worn, or modified. Then reinsert it.
5. Restore the iPhone.

Best of luck,

Mario