HT201274 attempted to download new ios 6 software. wiped out sim card and computer doesn't recognize iphone now. blinking apple icon is only thing I get

Need help with iphone 4. tried to download new software and it zorked sim card and phone. Only get a blinking apple icon. Computer doesn't recognize iphone so I can't restore

Hello henry lfrommiami,
Thanks for using Apple Support Communities.
To troubleshoot this issue where your iPhone gives you the message "No SIM Card installed" please follow the steps below.
Update your iPhone to the latest version of iOS.
Turn airplane mode on and then off again.
Restart your iPhone.
Check for a carrier settings update. Go to Settings > General > About. Install any available update.
Remove the SIM card and make sure that it's a valid SIM that your carrier provided. Also make sure that it's not damaged, worn, or modified. Then reinsert it.
A SIM tray that comes with one iPhone model won't necessarily work with a different iPhone model. When you insert the correct SIM tray, the SIM tray should be flush with the device.
If you have another SIM card, insert it. You can use a SIM card from any phone with the same format as your iPhone SIM card. If your iPhone works with that SIM card, contact the carrier that issued your original SIM card.
Restore the iPhone.
If you still see the issue, contact Apple support.
If you see 'No SIM' alert on iPhone
Cheers,
Alex H.

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