My sim card is not valid on my iphone 4s

I bought my iPhone 4S today and I also bought new SIM card. When I insert the SIM card it says that it isn't vaild.

Take out the sim, see if you scratched it, then confirm you are putting the sim in the correct way.

Try these individually
1. Update your iPhone to the latest version of iOS.
2. Toggle Airplane mode On and Off.
3. Try turning iPhone off and then on again.
4. Check for a carrier settings update. Tap Settings > General > About. If an update is available, a prompt will appear.
5. 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.
6. (last thing you should try) Restore the iPhone.
If you still are unable to resolve this issue, contact Apple support for further assistance.

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