Hello I would like to ask I have a problem with the Iphone 3gs 32 g I don install the ios 6.0 and now I can not activate the sim card .... I do not even know what's centenary advise me thank you

Hello
I would like to ask I have a problem with the Iphone 3gs 32 g
I don install the ios 6.0 and now I can not activate the sim card .... I do not even know what's centenary advise me thank you

Did you already try the suggestions from this article?
Symptoms
In certain situations, iPhone may present one of the following symptoms:
"Invalid SIM" or "No SIM Card installed" alert appears intermittently.
Status bar displays "No Service", "No SIM" or "Searching" in a location with good network coverage.
Resolution
If you encounter any of the above symptoms on your iPhone, try these steps to attempt to resolve the issue:
Update your iPhone to the latest version of iOS.
Toggle Airplane mode On and Off.
Try turning iPhone off and then on again.
Check for a carrier settings update. Tap Settings > General > About. If an update is available, a prompt will appear.
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.
Restore the iPhone.
copied from iPhone: Troubleshooting No Service or No SIM

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